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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Sales $ 9,430,000 $ 10,244,000
Cost of sales 3,765,000 4,295,000
Gross profit 5,665,000 5,949,000
Research and development 804,000 1,397,000
Professional services 1,449,000 1,574,000
Salaries and related costs 3,081,000 4,696,000
Selling, general and administrative 3,382,000 4,897,000
Total other costs and expenses 8,716,000 12,564,000
Loss from operations (3,051,000) (6,615,000)
Interest income 304,000 495,000
Interest expense (1,376,000) (1,396,000)
Other expense, net 0 (21,000)
Total other expense, net (1,072,000) (922,000)
Loss before income taxes (4,123,000) (7,537,000)
Income tax expense 49,000 53,000
Net loss (4,172,000) (7,590,000)
Net loss attributable to non-controlling interest (22,000) (14,000)
Net loss attributable to stockholders $ (4,150,000) $ (7,576,000)
Loss per share:    
Basic and diluted (in dollars per share) $ (0.1) $ (0.22)