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Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenues:    
Total revenues $ 1,200,000 $ 987,000
Operating expenses (income):    
Cost of revenues 682,000 471,000
Research and development 0 6,000
Gain on sale of intangible assets (750,000) 0
Impairment of property and equipment 0 36,000
Change in fair value of contingent consideration (1,000,000) 0
Selling, general and administrative 1,738,000 2,062,000
Total operating expenses 670,000 2,575,000
Income (loss) from continuing operations 530,000 (1,588,000)
Interest income 207,000 45,000
Other income , net 0 3,000
Change in fair value of common stock warrant and option liabilities 1,862,000 593,000
Net income (loss) from continuing operations 2,599,000 (947,000)
Net loss from discontinued operations 0 (1,476,000)
Net income (loss) attributable to common stockholders $ 2,599,000 $ (2,423,000)
Net income (loss) per share attributable to common stockholders:    
Basic net income (loss) per share attributable to common stockholders from continuing operations $ 1.9 $ (0.7)
Basic net income (loss) per share attributable to common stockholders from discontinued operations 0 (1.08)
Net income (loss) per basic share attributable to common stockholders 1.9 (1.78)
Diluted net income (loss) per share attributable to common stockholders from continuing operations 1.9 (0.7)
Diluted net income (loss) per share attributable to common stockholders from discontinued operations 0 (1.08)
Net income (loss) per diluted share attributable to common stockholders $ 1.9 $ (1.78)
Weighted-average number of shares used in per share calculations:    
Weighted average shares - Basic 1,366,060 1,361,657
Weighted average shares - Diluted 1,366,203 1,361,657
Other comprehensive income (loss), net of tax    
Unrealized gains on available-for-sale securities $ 0 $ 60,000
Other comprehensive income 0 60,000
Comprehensive income (loss) attributable to common stockholders 2,599,000 (2,363,000)
Product    
Revenues:    
Total revenues $ 1,200,000 $ 987,000