Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 6,673,000	$ 5,174,000	$ 18,473,000	$ 16,025,000
Cost of revenues	3,598,000	4,041,000	10,394,000	12,416,000
Gross profit	3,075,000	1,133,000	8,079,000	3,609,000
Operating Expenses:
General & administrative	1,329,000	1,341,000	4,138,000	4,727,000
Marketing & selling	652,000	896,000	1,950,000	2,858,000
Research & development	244,000	305,000	817,000	981,000
Total Operating Expenses	2,225,000	2,542,000	6,905,000	8,566,000
Operating income (loss)	850,000	(1,409,000)	1,174,000	(4,957,000)
Other Income (Expense):
Forgiveness of PPP loan	(2,181,000)		(2,181,000)
Settlement	(2,075,000)		(2,075,000)
Other	(31,000)	(17,000)	(44,000)	(129,000)
Total Other Income (Expense)	75,000	(17,000)	62,000	(129,000)
Income (loss) before provision for (benefit from) income taxes	925,000	(1,426,000)	1,236,000	(5,086,000)
Provision for (benefit from) income taxes	186,000	(319,000)	280,000	(1,770,000)
Net income (loss)	739,000	(1,107,000)	956,000	(3,316,000)
Other Comprehensive Income (Loss):
Foreign currency translation				(10,000)
Total comprehensive income (loss)	$ 739,000	$ (1,107,000)	$ 956,000	$ (3,326,000)
Basic net income (loss) per share (in dollars per share)	$ 0.13	$ (0.20)	$ 0.17	$ (0.60)
Diluted net income (loss) per share (in dollars per share)	$ 0.13	$ (0.20)	$ 0.17	(0.60)
Dividends declared, per share (in dollars per share)				$ 0.18