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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Sales:    
Total sales, net $ 14,726 $ 14,404
Cost of goods sold 6,831 6,623
Gross profit 7,895 7,781
Operating expenses    
Research and development 68 174
Sales and marketing 6,500 7,798
General and administrative 6,330 7,489
Goodwill, intangible and other asset impairment 2,593 6,737
Total operating expenses 15,491 22,198
Operating loss (7,596) (14,417)
Non-cash gain on changes in fair value of warrant liability 272 5,446
Non-cash gain on changes in fair value of embedded derivative liability 40 0
Non-cash gain on changes in fair value of contingent liability 0 561
Non-cash loss on modification of common stock warrants (292) (1,922)
Other expense, net (2,064) (276)
Net loss (9,640) (10,608)
Less: Increase to accumulated deficit due to adjustment to Preferred Stock conversion prices 7,057 5,657
Net loss attributable to common stockholders $ (16,697) $ (16,265)
Net loss per share attributable to common stockholders (basic and diluted)* (in dollars per share) $ (3.96) $ (10.1)
Weighted-average shares of common stock outstanding used in computing net loss per share of common stock (basic and diluted)* (in shares) 4,215 1,610
Product [Member]    
Sales:    
Total sales, net $ 14,687 $ 14,374
Product and Service, Other [Member]    
Sales:    
Total sales, net $ 39 $ 30