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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Income Statement [Abstract]    
Net sales $ 616 $ 833
Cost of sales 422 713
Gross profit 194 120
Operating expenses:    
Product development 50 128
Selling, general, and administrative 412 591
Total operating expenses 462 719
Loss from operations (268) (599)
Other expenses (income):    
Interest expense 0 5
Gain on debt extinguishment 0 (187)
Other expenses 0 1
Net loss $ (268) $ (418)
Net loss per common share - basic and diluted    
Net loss, basic (in dollars per share) $ (0.05) $ (0.09)
Net loss, diluted (in dollars per share) $ (0.05) $ (0.09)
Weighted average shares of common stock outstanding:    
Basic (in shares) 5,266 4,433
Diluted (in shares) 5,266 4,433