EARNINGS (LOSS) PER SHARE - Computation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
EPS - basic and diluted:
Basic	$ 0.51	$ (0.41)	$ 0.40	$ (0.84)
EPS numerator - basic and diluted:
Net income (loss)	$ 1,494	$ (1,157)	$ 1,169	$ (2,440)
EPS denominator:
Weighted-average common stock outstanding - basic (in shares)	2,931	2,858	2,910	2,920
Common stock equivalents: stock options and restricted stock units	91	0	66	0
Weighted-average number of common stock outstanding - diluted (in shares)	3,022	2,858	2,976	2,920