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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Statement [Abstract]    
Sales $ 27,711 $ 28,235
Cost of sales 10,207 9,141
Gross profit 17,504 19,094
Other costs and expenses:    
Research and development 3,920 3,731
Professional services 7,350 8,507
Salaries and related costs 14,630 14,025
Selling, general and administrative 11,687 13,700
Total other costs and expenses 37,587 39,963
Loss from operations (20,083) (20,869)
Interest income 241 1,392
Interest expense (46) (8)
Other income (loss), net 479 (351)
Total other income, net 674 1,033
Loss from operations before income taxes (19,409) (19,836)
Income tax benefit (7,503) (130)
Net loss (11,906) (19,706)
Net loss attributable to non-controlling interest (10) 0
Net loss attributable to stockholders $ (11,896) $ (19,706)
Loss per share    
Basic and Diluted (in dollars per share) $ (0.35) $ (0.58)
Weighted average number of shares outstanding - basic and diluted (in shares) 34,212 34,069