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Unaudited Condensed Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Income Statement [Abstract]    
Revenue $ 11,230 $ 10,394
Operating expenses:    
Costs of revenue 5,926 5,817
Selling, general and administrative expenses 11,884 12,152
Research and development expenses 1,126 2,104
Total operating expenses 18,936 20,073
Loss from operations (7,706) (9,679)
Interest expense (638) (598)
Interest income 656 5
Net loss $ (7,688) $ (10,272)
Net loss per share, basic (in dollars per share) $ (0.44) $ (0.60)
Net loss per share, diluted (in dollars per share) $ (0.44) $ (0.60)
Weighted-average number of shares used to compute net loss per share, basic (in shares) 17,526,763 16,992,391
Weighted-average number of shares used to compute net loss per share, diluted (in shares) 17,526,763 16,992,391