Annual report pursuant to Section 13 and 15(d)

Note 10 - Summary of Stock Options - Stock-based Compensation Expense Included in the Statement of Income (Details)

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Note 10 - Summary of Stock Options - Stock-based Compensation Expense Included in the Statement of Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Stock-based compensation expense $ 3,035 $ 1,872
Cost of Sales [Member]    
Stock-based compensation expense 69 19
Research and Development Expense [Member]    
Stock-based compensation expense 328 252
Selling, General and Administrative Expenses [Member]    
Stock-based compensation expense $ 2,638 $ 1,601