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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
EPS - basic and diluted:
Loss per share	$ (0.04)	$ (0.27)	$ (0.11)	$ (0.43)
EPS numerator - basic and diluted:
Net loss	$ (122)	$ (772)	$ (325)	$ (1,283)
EPS denominator:
Weighted-average common stock outstanding - basic (in shares)	2,906	2,839	2,899	2,952
Common stock equivalents: stock options and restricted stock units	0	0	0	0
Weighted-average number of common stock outstanding - diluted (in shares)	2,906	2,839	2,899	2,952