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Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Income Statement [Abstract]    
Revenue $ 45,520 $ 45,183
Cost of goods sold 13,027 11,748
Gross profit 32,493 33,435
Operating expenses    
Research and development 21,946 18,211
Selling, general and administrative 51,341 38,961
Total operating expenses 73,287 57,172
Loss from operations (40,794) (23,737)
Interest income 1,578 448
Interest expense (7,529) (7,410)
Other income (expense), net (337) (5,381)
Net loss (47,082) (36,080)
Unrealized loss on available-for-sale debt securities (836) (305)
Comprehensive loss $ (47,918) $ (36,385)
Net loss per share attributable to common stockholders, basic (in dollars per share) $ (1.91) $ (2.17)
Net loss per share attributable to common stockholders, diluted (in dollars per share) $ (1.91) $ (2.17)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares) 24,594,784 16,608,800
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares) 24,594,784 16,608,800