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Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Income Statement [Abstract]        
Revenue $ 7,375 $ 7,735 $ 14,920 $ 14,773
Cost of goods sold 4,568 4,311 9,297 8,346
Gross profit 2,807 3,424 5,623 6,427
Operating expenses:        
Sales and marketing 1,562 1,755 3,122 3,328
Research and product development 1,177 1,487 2,530 2,761
General and administrative 1,717 1,668 3,473 3,348
Total operating expenses 4,456 4,910 9,125 9,437
Operating loss (1,649) (1,486) (3,502) (3,010)
Interest expense (94) (107) (195) (219)
Other income, net 1,505 15 1,508 10
Loss before income taxes (238) (1,578) (2,189) (3,219)
Provision for income taxes 19 8 35 22
Net loss $ (257) $ (1,586) $ (2,224) $ (3,241)
Basic weighted average shares outstanding (in shares) 23,948,631 18,775,817 23,923,110 18,775,795
Diluted weighted average shares outstanding (in shares) 23,948,631 18,775,817 23,923,110 18,775,795
Basic loss per share (in dollars per share) $ (0.01) $ (0.08) $ (0.09) $ (0.17)
Diluted loss per share (in dollars per share) $ (0.01) $ (0.08) $ (0.09) $ (0.17)
Comprehensive loss:        
Net loss $ (257) $ (1,586) $ (2,224) $ (3,241)
Unrealized gain (loss) on available-for-sale securities, net of tax 26 (3) (2) (5)
Change in foreign currency translation adjustment (12) (10) (23) (22)
Comprehensive loss $ (243) $ (1,599) $ (2,249) $ (3,268)