Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net product revenue	$ 2,485,000	$ 1,991,000	$ 6,374,000	$ 4,766,000
Cost of products sold	1,307,000	1,024,000	3,405,000	2,509,000
Gross profit	1,178,000	967,000	2,969,000	2,257,000
Selling, general and administrative expenses	467,000	542,000	1,527,000	1,659,000
Operating income	711,000	425,000	1,442,000	598,000
Interest income, net	6,000	7,000	15,000	28,000
Other (expense)income, net	(38,000)	12,000	151,000	29,000
Income before income taxes	679,000	444,000	1,608,000	655,000
Income tax provision	(1,000)	(1,000)	(3,000)	(3,000)
Net income	678,000	443,000	1,605,000	652,000
Other comprehensive income:
Foreign currency translation adjustment	(9,000)	0	(25,000)	(5,000)
Comprehensive income	$ 669,000	$ 443,000	$ 1,580,000	$ 647,000
Net income per share: Basic (in Dollars per share)	$ 0.12	$ 0.08	$ 0.27	$ 0.11
Diluted (in Dollars per share)	0.11	0.08	0.27	0.11
Cash dividends declared per common share (in Dollars per share)	$ 0.04	$ 0.035	$ 0.12	$ 0.105
Common Class A [Member]
Other comprehensive income:
Weighted average shares outstanding: Basic (in Shares)	5,861,180	5,802,847	5,838,699	5,787,014
Common Class B [Member]
Other comprehensive income:
Weighted average shares outstanding: Diluted (in Shares)	5,931,180	5,845,847	5,918,699	5,840,014