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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Income Statement [Abstract]        
Revenue $ 16,691 $ 8,476 $ 30,888 $ 15,668
Cost of sales 8,205 4,893 14,710 8,558
Gross profit 8,486 3,583 16,178 7,110
Operating expenses:        
Research and development 6,706 4,476 11,717 8,998
Selling, general and administrative 19,655 12,299 38,040 22,648
Total operating expenses 26,361 16,775 49,757 31,646
Loss from operations (17,875) (13,192) (33,579) (24,536)
Interest expense (1,441) (1,436) (2,862) (2,900)
Interest and other income, net 132 48 72 34
Net loss $ (19,184) $ (14,580) $ (36,369) $ (27,402)
Net loss per share, basic (in dollars per share) $ (0.43) $ (2.60) $ (0.82) $ (5.25)
Net loss per share, diluted (in dollars per share) $ (0.43) $ (2.60) $ (0.82) $ (5.25)
Weighted-average shares used in computing net loss per share attributable to common shareholders        
Basic (in shares) 44,324,000 5,597,000 44,091,000 5,216,000
Diluted (in shares) 44,324,000 5,597,000 44,091,000 5,216,000
Other comprehensive loss:        
Unrealized gain (loss) on cash equivalents $ 85 $ (9) $ 87 $ (25)
Comprehensive loss $ (19,099) $ (14,589) $ (36,282) $ (27,427)