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Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Income Statement [Abstract]    
Revenue $ 7,545 $ 7,038
Cost of goods sold 4,729 4,035
Gross profit 2,816 3,003
Operating expenses:    
Sales and marketing 1,560 1,573
Research and product development 1,353 1,274
General and administrative 1,756 1,680
Total operating expenses 4,669 4,527
Operating loss (1,853) (1,524)
Interest expense (101) (112)
Other income, net 3 (5)
Loss before income taxes (1,951) (1,641)
Provision for income taxes 16 14
Net loss $ (1,967) $ (1,655)
Basic weighted average shares outstanding (in shares) 23,897,305 18,775,773
Diluted weighted average shares outstanding (in shares) 23,897,305 18,775,773
Basic loss per share (in dollars per share) $ (0.08) $ (0.09)
Diluted loss per share (in dollars per share) $ (0.08) $ (0.09)
Comprehensive loss:    
Net loss $ (1,967) $ (1,655)
Unrealized gain (loss) on available-for-sale securities, net of tax (28) (2)
Change in foreign currency translation adjustment (11) (12)
Comprehensive loss $ (2,006) $ (1,669)