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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Net revenue        
Total net revenue $ 3,294 $ 2,018 $ 10,981 $ 3,816
Cost of net revenue 2,000 919 6,747 1,973
Gross profit 1,294 1,099 4,234 1,843
Operating expenses        
Research and development 4,509 2,696 15,636 8,375
Selling, general and administrative 3,353 1,746 8,938 4,852
Gain on license and asset sale (2,557)   (2,557)  
Total operating expenses 5,305 4,442 22,017 13,227
Loss from operations (4,011) (3,343) (17,783) (11,384)
Interest expense (5) (870) (11) (2,170)
Other expense, net 8 392 (11) 147
Net loss (4,008) (3,821) (17,805) (13,407)
Other comprehensive loss, net of tax:        
Net unrealized gain (loss) on available-for-sale securities 5   (36)  
Comprehensive loss $ (4,003) $ (3,821) $ (17,841) $ (13,407)
Net loss per share        
Basic $ (0.20) $ (0.73) $ (0.89) $ (2.55)
Diluted $ (0.20) $ (0.73) $ (0.89) $ (2.55)
Shares used in computing net loss per share        
Basic 20,039 5,258 19,950 5,250
Diluted 20,039 5,258 19,950 5,250
Product        
Net revenue        
Total net revenue $ 3,060 $ 1,389 $ 10,384 $ 3,016
Royalty and Other        
Net revenue        
Total net revenue $ 234 $ 629 $ 597 $ 800