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Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details) - Summary of Stock-based Compensation (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Allocated Stock-based Compensation $ 152 $ 53 $ 410 $ 149
Cost of Sales [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Allocated Stock-based Compensation 4 1 10 2
Research and Development Expense [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Allocated Stock-based Compensation 3 11 5 26
Selling, General and Administrative Expenses [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Allocated Stock-based Compensation $ 145 $ 41 $ 395 $ 121