| **Note 8 - Business Combination (Tables)**                                                   | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
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| **Business Combinations [Abstract]**                                                         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Revenue Recognition, Milestone Method [Table Text Block]                                     | **Revenue milestones**
* *
**Additional shares**
* *
$15.5 million in 2013
                                                2,772,598                           
$16.0 million in 2014
                                                1,584,342                           
$16.5 million in 2015
                                                1,742,776                           
Total
                                                6,099,716                                                                                                                          
Or, alternatively, if $33.0million for 2013 and 2014combined
                                                6,099,716                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] | Net fair value of assets acquired
                             $                  107                           
Intangible assets
                                                9,930                           
Goodwill
                                                14,555                                                                           $                  24,592                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Schedule of Intangible Assets [Table Text Block]                                             |                                                                                                         
Estimated

useful life
                   
Definite-lived intangibles:
                                                                                                                                                        
Customer relationships
                             $                  6,400                                                                           10                           
Proprietary technology
                                                800                                                                           15                           
Other intangibles
                                                830                                                                           15                                                                                                                                                                                                      
Indefinite-lived intangibles:
                                                                                                                                                        
Tradename
                                                1,900                                                                           -                                                                           $                  9,930                                                                                                |
| Business Acquisition, Pro Forma Information [Table Text Block]                               | ** **** **
****September 30,****
** **** **** **
****2013****
** **** **
****2012****
** **
Net sales
                             $                  38,566                                                        $                  34,449                           
Net loss
                                                (5,583                  )                                                        (3,926                  )        
Net loss per share - basic and diluted
                             $                  (0.19                  )                                     $                  (0.13                  )                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |

| X                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
No authoritative reference available.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Tabular disclosure of the entity's accounting policy for the recognition of revenue under the milestone method. Includes: (1) a description of the overall arrangement; (2) a description of each milestone and related contingent consideration; (3) a determination of whether each milestone is considered substantive; (4) the factors that the entity considered in determining whether the milestone or milestones are substantive; and (5) the amount of consideration recognized during the period for the milestone or milestones.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 28 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=19771982&loc=SL6892174-166501
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472
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