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Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Statement [Abstract]    
Revenue $ 34,473 $ 7,717
Cost of sales 18,608 8,972
Gross profit 15,865 (1,255)
Operating expenses:    
Research and development 18,993 16,275
Selling, general and administrative 51,036 30,272
Total operating expenses 70,029 46,547
Loss from operations (54,164) (47,802)
Interest expense (5,810) (5,261)
Interest and other income (expense), net 121 44
Net loss $ (59,853) $ (53,019)
Net loss per share, basic (in dollars per share) $ (3.63) $ (14.47)
Net loss per share, diluted (in dollars per share) $ (3.63) $ (14.47)
Weighted-average shares used in computing net loss per share attributable to common shareholders    
Basic (in shares) 16,480 3,663
Diluted (in shares) 16,480 3,663
Other comprehensive loss:    
Unrealized loss on cash equivalents $ (40) $ (18)
Comprehensive loss $ (59,893) $ (53,037)