|**Note 6. Product Warranty (Tables)**                     | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|--------------------------------------------------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|Schedule of Product Warranty Liability [Table Text Block] | Three

              MonthsEnded

              March 31,2013

          

          

          2012Balance

              at beginning of period

          

          $

          50

          

          

          $

          50Provisions

          

          

          29

          

          

          

          34Warranty

              services provided

          

          

          (24

          )

          

          

          (34

          )$

          55

          

          

          $

          50
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|                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Balance

              at beginning of period             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Provisions                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Warranty

              services provided                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

X- DefinitionTabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability.+ ReferencesReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249+ Details**Name:**
                    us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock**Namespace Prefix:**
                    us-gaap_**Data Type:**
                    nonnum:textBlockItemType**Balance Type:**
                    na**Period Type:**
                    duration