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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Statement [Abstract]        
Sales $ 11,224 $ 4,296 $ 19,862 $ 9,293
Cost of sales 3,690 2,202 6,468 4,215
Gross profit 7,534 2,094 13,394 5,078
Other costs and expenses:        
Research and development 1,084 975 2,199 1,955
Professional services 1,889 1,658 3,410 4,047
Salaries and related costs 4,343 3,439 8,588 6,750
Selling, general and administrative 4,261 2,189 7,985 5,985
Total other costs and expenses 11,577 8,261 22,182 18,737
Loss from operations (4,043) (6,167) (8,788) (13,659)
Interest income 4 7 7 223
Interest expense (2) (8) (6) (14)
Other income (loss), net 97 (14) 4 412
Total other income (loss), net 99 (15) 5 621
Loss before income taxes (3,944) (6,182) (8,783) (13,038)
Income tax expense (benefit) 107 (1,492) 173 (6,397)
Net loss (4,051) (4,690) (8,956) (6,641)
Net loss attributable to non-controlling interest (5) 0 (9) 0
Net loss attributable to stockholders $ (4,046) $ (4,690) $ (8,947) $ (6,641)
Loss per share:        
Basic (in dollars per share) $ (0.12) $ (0.14) $ (0.26) $ (0.19)
Diluted (in dollars per share) $ (0.12) $ (0.14) $ (0.26) $ (0.19)