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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Sales:    
Total sales, net $ 3,124 $ 3,273
Product cost of goods sold 1,188 1,459
Gross profit 1,936 1,814
Operating expenses:    
Research and development 26 28
Sales and marketing 1,653 1,985
General and administrative 1,991 2,183
Total operating expenses 3,670 4,196
Operating loss (1,734) (2,382)
Non-cash gain on changes in fair value of warrant liability 0 2,056
Non-cash gain on changes in fair value of contingent liability 0 219
Other expense, net (5) (4)
Net loss $ (1,739) $ (111)
Net loss per share attributable to common stockholders (basic and diluted) (in dollars per share) $ (0.85) $ (0.08)
Weighted-average shares of common stock outstanding used in computing net loss per share of common stock (basic and diluted) (in shares) 2,035 1,431
Product [Member]    
Sales:    
Total sales, net $ 3,117 $ 3,267
Product and Service, Other [Member]    
Sales:    
Total sales, net $ 7 $ 6