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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Income Statement [Abstract]        
Net sales $ 1,553 $ 1,055 $ 2,386 $ 1,985
Cost of sales 1,427 876 2,140 1,789
Gross profit 126 179 246 196
Operating expenses:        
Product development 140 147 268 301
Selling, general, and administrative 543 1,132 1,134 2,198
Total operating expenses 683 1,279 1,402 2,499
Loss from operations (557) (1,100) (1,156) (2,303)
Other expenses (income):        
Interest expense, net 0 69 5 192
Gain on debt extinguishment 0 0 (187) 0
Other income (4) (16) (4) (16)
Other expenses 1 14 2 21
Net loss $ (554) $ (1,167) $ (972) $ (2,500)
Net loss per common share - basic and diluted        
Net loss, basic (in dollars per share) $ (0.12) $ (0.42) $ (0.21) $ (0.98)
Net loss, diluted (in dollars per share) $ (0.12) $ (0.42) $ (0.21) $ (0.98)
Weighted average shares of common stock outstanding:        
Basic (in shares) 4,785 2,766 4,609 2,539
Diluted (in shares) 4,785 2,766 4,609 2,539