Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Summary of Stock Options - Stock-based Compensation Expense Included in the Statement of Income (Details)

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Note 8 - Summary of Stock Options - Stock-based Compensation Expense Included in the Statement of Income (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Allocated share-based compensation expense $ 455 $ 202 $ 827 $ 390
Cost of Sales [Member]        
Allocated share-based compensation expense 4 7
Research and Development Expense [Member]        
Allocated share-based compensation expense 57 28 108 49
Selling, General and Administrative Expenses [Member]        
Allocated share-based compensation expense $ 394 $ 174 $ 712 $ 341