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NOTE 9 - SHARE-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 30, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Impact on operations of recording share-based compensation
     Three Months Ended      Six Months Ended  
    Jun. 30,2019     Jun. 30,2018     Jun. 30,2019     Jun. 30,2018  
 (in thousands)                        
Cost of goods sold   $ 10     $ 11     $ 16     $ 15  
Research and development     103       107       166       149  
Selling, general and administrative     251       355       469       486  
Total share-based compensation   $ 364     $ 473     $ 651     $ 650  
Equity award activity
     Three Months Ended      Six Months Ended  
    Jun. 30,2019     Jun. 30,2018     Jun. 30,2019     Jun. 30,2018  
Restricted Stock Units    276,700      204,856      276,700     205,856  
Stock Options    25,000       -     25,000       
Future equity compensation expense
    Jun. 30,2019  
       
Unamortized future equity compensation expense (in thousands)   $ 2,874  
Remaining weighted average amortization period (in years)     2.77