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Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Income Statement [Abstract]    
Net product revenue $ 1,082,000 $ 963,000
Cost of products sold 457,000 467,000
Gross profit 625,000 496,000
Selling, general and administrative expenses 560,000 570,000
Operating income (loss) 65,000 (74,000)
Interest income, net 50,000 78,000
Other income (expense), net (395,000) 556,000
Income (loss) before income taxes (280,000) 560,000
Income tax provision (6,000) (8,000)
Net income (loss) (286,000) 552,000
Other comprehensive income (loss):    
Foreign currency translation adjustment (14,000) 8,000
Comprehensive income (loss) $ (300,000) $ 560,000
Net income (loss) per share: Basic (in Dollars per share) $ (0.05) $ 0.09
Net income (loss) per share: Diluted (in Dollars per share) $ (0.05) $ 0.09
Weighted average shares outstanding:Basic (in Shares) 6,021,180 6,021,180
Weighted average shares outstanding: Diluted (in Shares) 6,021,180 6,031,180
Cash dividends declared per common share (in Dollars per share) $ 0.05 $ 0.05