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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Net revenue        
Total net revenue $ 4,284 $ 697 $ 7,687 $ 1,798
Cost of net revenue 2,799 435 4,747 1,054
Gross profit 1,485 262 2,940 744
Operating expenses        
Research and development 5,643 2,892 11,127 5,679
Selling, general and administrative 2,878 1,799 5,585 3,106
Total operating expenses 8,521 4,691 16,712 8,785
Loss from operations (7,036) (4,429) (13,772) (8,041)
Interest expense (6) (786) (6) (1,300)
Other expense, net (1) (215) (19) (245)
Net loss (7,043) (5,430) (13,797) (9,586)
Other comprehensive loss, net of tax:        
Net unrealized loss on available-for-sale securities (4)   (41)  
Comprehensive loss $ (7,047) $ (5,430) $ (13,838) $ (9,586)
Net loss per share        
Basic $ (0.33) $ (1.03) $ (0.64) $ (1.83)
Diluted $ (0.33) $ (1.03) $ (0.64) $ (1.83)
Shares used in computing net loss per share        
Basic 21,636 5,251 21,610 5,241
Diluted 21,636 5,251 21,610 5,241
Product        
Net revenue        
Total net revenue $ 4,120 $ 576 $ 7,324 $ 1,627
Royalty and Other        
Net revenue        
Total net revenue $ 164 $ 121 $ 363 $ 171