Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net product revenue	$ 1,964,000	$ 1,472,000
Cost of products sold	1,103,000	801,000
Gross profit	861,000	671,000
Selling, general and administrative expenses	540,000	598,000
Operating income	321,000	73,000
Interest income, net	3,000	11,000
Other income, net	14,000	7,000
Income before income taxes	338,000	91,000
Income tax provision	(1,000)	(1,000)
Net income	337,000	90,000
Other comprehensive income:
Foreign currency translation adjustment	(13,000)	0
Comprehensive income	$ 324,000	$ 90,000
Net income per share: Basic (in Dollars per share)	$ 0.06	$ 0.02
Diluted (in Dollars per share)	0.06	0.02
Cash dividends declared per common share (in Dollars per share)	$ 0.040	$ 0.035
Common Class A [Member]
Other comprehensive income:
Weighted average shares outstanding: Basic (in Shares)	5,824,847	5,797,847
Common Class B [Member]
Other comprehensive income:
Weighted average shares outstanding: Diluted (in Shares)	5,914,847	5,877,847