CONDENSED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
REVENUES	$ 4,012	$ 4,831	$ 11,415	$ 12,491
COST OF REVENUES	(358)	(1,510)	(1,038)	(3,200)
Gross profit	3,654	3,321	10,377	9,291
OPERATING EXPENSES
Selling, general and administrative	2,917	2,930	8,985	11,688
Research and development	1,461	1,416	4,682	4,105
Total operating expenses	4,378	4,346	13,667	15,793
Loss from operations	(724)	(1,025)	(3,290)	(6,502)
OTHER INCOME
Gain on forgiveness of unsecured promissory note	0	0	0	10
Interest and other income	0	(1)	0	6
Total other income	0	(1)	0	16
Net loss	$ (724)	$ (1,026)	$ (3,290)	$ (6,486)
Loss per common share -
Basic (in dollars per share)	$ (0.04)	$ (0.06)	$ (0.17)	$ (0.35)
Diluted (in dollars per share)	$ (0.04)	$ (0.06)	$ (0.17)	$ (0.35)
Weighted average common shares used in computing per share amounts -
Basic (in shares)	18,918,596	18,642,463	18,802,892	18,580,012
Diluted (in shares)	18,918,596	18,642,463	18,802,892	18,580,012