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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, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Sales:        
Total sales, net $ 3,045 $ 2,133 $ 5,674 $ 3,940
Product cost of goods sold 1,495 614 2,608 1,069
Gross profit 1,550 1,519 3,066 2,871
Operating expenses:        
Research and development 40 21 68 26
Sales and marketing 1,752 1,788 3,439 3,468
General and administrative 1,910 1,569 4,093 2,756
Total operating expenses 3,702 3,378 7,600 6,250
Operating loss (2,152) (1,859) (4,534) (3,379)
Non-cash gain on changes in fair value of warrant liability     2,056  
Non-cash gain on changes in fair value of contingent liability     219  
Other (expense) income, net 3   7 (2)
Loss before provision for income taxes (2,155) (1,859) (2,266) (3,377)
Net loss and comprehensive loss $ (2,155) $ (1,859) $ (2,266) $ (3,377)
Net loss per share (basic and diluted) (in dollars per share) $ (0.04) $ (0.04) $ (0.04) $ (0.08)
Weighted-average shares of common stock used in computing net loss per share (basic and diluted) (in shares) 52,735 42,561 51,419 42,174
Product [Member]        
Sales:        
Total sales, net $ 3,043 $ 2,126 $ 5,666 $ 3,927
Product and Service, Other [Member]        
Sales:        
Total sales, net $ 2 $ 7 $ 8 $ 13