|**Note 2. Long-Term Incentive Plans (Tables)**                                                                  | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|--------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]                  | Three

              MonthsEnded

              March 31,2013

          

          

          2012Expected

              volatility

          

          

          76.23

          %

          

          

          69.82

          %Risk-free

              interest rate

          

          

          1.06

          %

          

          

          1.48

          %Expected

              dividend yield

          

          

          0.00

          %

          

          

          0.00

          %Expected

              life (in years)

          

          

          6.0

          

          

          

          6.0Estimated

              fair value per option granted

          

          $

          0.87

          

          

          $

          1.01
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Expected

              volatility                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Risk-free

              interest rate                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Expected

              dividend yield                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Expected

              life (in years)                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Estimated

              fair value per option granted                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]                                | Number

              of

              OptionsOutstanding

              at January 1, 2013

          

          

          4,294,273Granted

          

          

          60,000Exercised

          

          

          (50,000

          )Forfeited

              and cancelled

          

          

          (98,411

          )Outstanding

              at March 31, 2013

          

          

          4,205,862                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Outstanding

              at January 1, 2013                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Granted                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Exercised                                                                                                       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Forfeited

              and cancelled                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Outstanding

              at March 31, 2013                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]                  | SharesNonvested

              at January 1, 2013

          

          

          343,161Granted

          

          

          329,164Vested

              and settled in shares

          

          

          (168,995

          )Nonvested

              at March 31, 2013

          

          

          503,330                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Nonvested

              at January 1, 2013                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Granted                                                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Vested

              and settled in shares                                                                     |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Nonvested

              at March 31, 2013                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] | Three

              MonthsEnded

              March 31,2013

          

          

          2012Cost

              of sales

          

          $

          17

          

          

          $

          19Research

              and development

          

          

          87

          

          

          

          96Selling,

              general and administrative

          

          

          236

          

          

          

          189$

          340

          

          

          $

          304                                                                                                                                                                                                                                                              
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Cost

              of sales                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Research

              and development                                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Selling,

              general and administrative                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

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