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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Net revenue        
Total net revenue $ 2,403 $ 4,284 $ 7,436 $ 7,687
Cost of net revenue 1,795 2,799 4,901 4,747
Gross profit 608 1,485 2,535 2,940
Operating expenses        
Research and development 3,668 5,643 7,555 11,127
Selling, general and administrative 1,977 2,878 4,219 5,585
Gain on license and asset sale (406)
Total operating expenses 5,645 8,521 11,368 16,712
Loss from operations (5,037) (7,036) (8,833) (13,772)
Change in fair value of warrant liabilities 966 1,624
Other expense, net (15) (7) (25) (25)
Net loss (4,086) (7,043) (7,234) (13,797)
Other comprehensive loss, net of tax:        
Net unrealized gain (loss) on available-for-sale securities 7 (4) 21 (41)
Comprehensive loss $ (4,079) $ (7,047) $ (7,213) $ (13,838)
Net loss per share        
Net loss per share, basic (in Dollars per share) $ (0.17) $ (0.33) $ (0.32) $ (0.64)
Shares used in computing net loss per share        
Shares used in computing net loss per share, basic (in Shares) 24,338 21,636 22,442 21,610
Product        
Net revenue        
Total net revenue $ 2,235 $ 4,120 $ 7,123 $ 7,324
Royalty and Other        
Net revenue        
Total net revenue $ 168 $ 164 $ 313 $ 363