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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Income Statement [Abstract]    
Revenue $ 4,178 $ 7,545
Cost of goods sold 2,863 4,729
Gross profit 1,315 2,816
Operating expenses:    
Sales and marketing 1,192 1,560
Research and product development 1,043 1,353
General and administrative 1,269 1,756
Total operating expenses 3,504 4,669
Operating loss (2,189) (1,853)
Interest expense (292) (101)
Other income, net 1,666 3
Loss before income taxes (815) (1,951)
Provision for income taxes 17 16
Net loss $ (832) $ (1,967)
Basic weighted average shares outstanding (in shares) 23,955,767 23,897,305
Diluted weighted average shares outstanding (in shares) 23,955,767 23,897,305
Basic loss per share (in dollars per share) $ (0.03) $ (0.08)
Diluted loss per share (in dollars per share) $ (0.03) $ (0.08)
Comprehensive loss:    
Net loss $ (832) $ (1,967)
Unrealized loss on available-for-sale securities, net of tax 0 (28)
Change in foreign currency translation adjustment 5 (11)
Comprehensive loss $ (827) $ (2,006)