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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Income Statement [Abstract]    
Net sales $ 4,860 $ 5,717
Cost of sales 4,161 5,494
Gross profit 699 223
Operating expenses:    
Product development 524 587
Selling, general, and administrative 2,017 3,607
Total operating expenses 2,541 4,194
Loss from operations (1,842) (3,971)
Other expenses (income):    
Interest income 0 (57)
Interest expense 5 380
Gain on debt extinguishment (187) 0
Gain on partial lease termination (63) 0
Other income (27) (30)
Other expenses 10 26
Loss from operations before income taxes (1,580) (4,290)
Provision for income taxes 2 3
Net loss $ (1,582) $ (4,293)
Net loss per common stock basic and diluted:    
Net loss, basic (in dollars per share) $ (0.32) $ (1.32)
Net loss, diluted (in dollars per share) $ (0.32) $ (1.32)
Weighted average shares of common stock outstanding:    
Basic (in shares) 4,947 3,241
Diluted (in shares) 4,947 3,241