EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
EARNINGS PER SHARE
Net income (loss)	$ 847,000	$ (657,000)	$ (1,820,000)	$ 12,000	$ (29,000)	$ (333,000)	$ (1,630,000)	$ (350,000)
Denominator for basic earnings (loss) per share: weighted average shares	8,816			8,621			8,715	8,519
Employee stock options and awards	$ 43,000			$ 139,000			$ 0	$ 0
Denominator for diluted earnings (loss) per share: adjusted weighted-average shares and assumed conversions of stock options	8,859			8,760			8,715	8,519
Basic earnings (loss) per share	$ 0.10			$ 0.00			$ (0.19)	$ (0.04)
Diluted earnings (loss) per share	$ 0.10			$ 0.00			$ (0.19)	$ (0.04)