EARNINGS (LOSS) PER SHARE - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
EARNINGS (LOSS) PER SHARE
Net income (loss)	$ 4,746	$ (4,698)
Denominator:
Denominator for basic earnings (loss) per share - weighted average shares	8,775	8,525
Effect of dilutive securities:
Employee restricted stock and incentive stock options	99	0
Denominator for diluted earnings (loss) per share - adjusted weighted average shares and assumed conversion (in shares)	8,874	8,525
Basic earnings (loss) per share (in dollars per share)	$ 0.54	$ (0.55)
Diluted earnings (loss) per share (in dollars per share)	$ 0.53	$ (0.55)
Weighted average anti-dilutive employee restricted stock and incentive stock options (in shares)	313	433