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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Net revenue    
Total net revenue $ 3,403 $ 1,101
Cost of net revenue 1,590 619
Gross profit 1,813 482
Operating expenses    
Research and development 6,003 2,787
Selling, general and administrative 2,546 1,307
Total operating expenses 8,549 4,094
Loss from operations (6,736) (3,612)
Interest expense   (513)
Other expense, net (18) (32)
Net loss (6,754) (4,157)
Other comprehensive loss, net of tax:    
Net unrealized loss on available-for-sale securities (37)  
Comprehensive loss $ (6,791) $ (4,157)
Net loss per share    
Basic $ (0.34) $ (0.79)
Diluted $ (0.34) $ (0.79)
Shares used in computing net loss per share    
Basic 19,769 5,241
Diluted 19,769 5,241
Product    
Net revenue    
Total net revenue $ 3,204 $ 1,051
Royalty and Other    
Net revenue    
Total net revenue $ 199 $ 50