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Consolidated Statements of Operations and Comprehensive Income - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Net product revenue $ 4,141,000 $ 6,108,000
Cost of products sold 2,023,000 2,660,000
Gross profit 2,118,000 3,448,000
Selling, general and administrative expenses 2,222,000 2,248,000
Operating (loss)income (104,000) 1,200,000
Interest income, net 289,000 221,000
Other income, net 1,230,000 836,000
Income before income taxes 1,415,000 2,257,000
Income tax provision (513,000) (412,000)
Net income 902,000 1,845,000
Other comprehensive income:    
Foreign currency translation adjustment 12,000 (3,000)
Comprehensive income $ 914,000 $ 1,842,000
Weighted average shares outstanding: Basic (in Shares) 6,021,180 6,005,277
Weighted average shares outstanding: Diluted (in Shares) 6,021,180 6,030,277
Cash dividends declared per common share (in Dollars per share) $ 0.2 $ 0.2
Common Class A [Member]    
Other comprehensive income:    
Net income per share: Basic (in Dollars per share) 0.15 0.31
Net income per share: Diluted (in Dollars per share) $ 0.15 $ 0.31
Weighted average shares outstanding: Basic (in Shares) 5,258,568 5,242,665
Weighted average shares outstanding: Diluted (in Shares) 5,258,568 5,267,665
Common Class B [Member]    
Other comprehensive income:    
Net income per share: Basic (in Dollars per share) $ 0.15 $ 0.31
Net income per share: Diluted (in Dollars per share) $ 0.15 $ 0.31
Weighted average shares outstanding: Basic (in Shares) 762,612 762,612
Weighted average shares outstanding: Diluted (in Shares) 762,612 762,612