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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Statement [Abstract]        
Sales $ 11,831 $ 6,954 $ 31,693 $ 16,247
Cost of sales 3,775 2,229 10,243 6,444
Gross profit 8,056 4,725 21,450 9,803
Other costs and expenses:        
Research and development 1,175 1,047 3,374 3,002
Professional services 2,032 1,835 5,442 5,882
Salaries and related costs 4,206 3,508 12,794 10,258
Selling, general and administrative 4,611 2,706 12,596 8,691
Total other costs and expenses 12,024 9,096 34,206 27,833
Loss from operations (3,968) (4,371) (12,756) (18,030)
Interest income 2 10 9 233
Interest expense (3) (25) (9) (39)
Other (loss) income, net (192) (63) (188) 349
Total other (loss) income, net (193) (78) (188) 543
Loss before income taxes (4,161) (4,449) (12,944) (17,487)
Income tax expense (benefit) 73 (715) 246 (7,112)
Net loss (4,234) (3,734) (13,190) (10,375)
Net loss attributable to non-controlling interest (12) (6) (21) (6)
Net loss attributable to stockholders $ (4,222) $ (3,728) $ (13,169) $ (10,369)
Loss per share:        
Basic (in dollars per share) $ (0.12) $ (0.11) $ (0.38) $ (0.30)
Diluted (in dollars per share) $ (0.12) $ (0.11) $ (0.38) $ (0.30)