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Unaudited Condensed Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Income Statement [Abstract]    
Revenue $ 10,394 $ 10,587
Operating expenses:    
Costs of revenue 5,817 4,711
Selling, general and administrative expenses 12,152 10,040
Research and development expenses 2,104 1,403
Total operating expenses 20,073 16,154
Loss from operations (9,679) (5,567)
Interest expense (598) (645)
Other income, net 5 3
Net loss $ (10,272) $ (6,209)
Net loss per share, basic (in dollars per share) $ (0.60) $ (0.48)
Net loss per share, diluted (in dollars per share) $ (0.60) $ (0.48)
Weighted-average number of shares used to compute net loss per share, basic (in shares) 16,992,391 12,943,237
Weighted-average number of shares used to compute net loss per share, diluted (in shares) 16,992,391 12,943,237