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Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Net product revenue $ 1,552,000 $ 1,964,000
Cost of products sold 749,000 1,103,000
Gross profit 803,000 861,000
Selling, general and administrative expenses 557,000 540,000
Operating income 246,000 321,000
Interest income, net 4,000 3,000
Other (expense)income, net (83,000) 14,000
Income before income taxes 167,000 338,000
Income tax benefit(provision) 1,875,000 (1,000)
Net income 2,042,000 337,000
Other comprehensive income:    
Foreign currency translation adjustment (17,000) (13,000)
Comprehensive income $ 2,025,000 $ 324,000
Net income per share: Basic (in Dollars per share) $ 0.35 $ 0.06
Diluted (in Dollars per share) 0.34 0.06
Cash dividends declared per common share (in Dollars per share) $ 0.045 $ 0.04
Common Class A [Member]    
Other comprehensive income:    
Weighted average shares outstanding: Basic (in Shares) 5,876,180 5,824,847
Common Class B [Member]    
Other comprehensive income:    
Weighted average shares outstanding: Diluted (in Shares) 5,957,180 5,914,847