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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenues        
Product sales $ 133 $ 0 $ 314 $ 14
Cost of revenues        
Product sales 6 0 23 42
Service and other 0 0 0 119
Total cost of revenues 6 0 23 161
Gross profit (loss) 127 0 291 (147)
Operating expenses        
Selling, general and administrative 2,745 3,514 14,393 8,292
Research and development 112 727 486 6,238
Restructuring and impairment 0 542 0 4,069
Loss on impairment of goodwill 0 0 60,934 0
Total operating expenses 2,857 4,783 75,813 18,599
Operating loss (2,730) (4,783) (75,522) (18,746)
Other income, net        
Change in fair value of royalties payable 716 0 5,333 0
Interest income 87 24 275 41
Other (expense) income, net 0 (4) 11 (1)
Total other income, net 803 20 5,619 40
Loss from operations before income taxes (1,927) (4,763) (69,903) (18,706)
Income taxes 0 0 0 0
Net loss (1,927) (4,763) (69,903) (18,706)
Deemed dividends from the warrant inducement offer 0 0 (800) 0
Net loss attributable to common stockholders $ (1,927) $ (4,763) $ (70,703) $ (18,706)
Net Loss per share attributable to common stockholders, basic and diluted $ (0.28) $ (4.36) $ (14.20) $ (28.00)
Weighted average common shares used in computing net loss per share, basic and diluted 6,805,958 1,092,239 4,980,538 668,494