(LOSS) EARNINGS PER SHARE - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
(LOSS) EARNINGS PER SHARE
Net (loss) income	$ (1,373)	$ 1	$ 1,501	$ 3,300	$ 2,544	$ 1,035	$ 129	$ 6,879
Denominator:
Denominator for basic earnings per share - weighted average shares (in shares)	8,564			8,223			8,509	8,170
Effect of dilutive securities:
Employee restricted stock and incentive stock options (in shares)				17			13	23
Denominator for diluted earnings per share - adjusted weighted average shares and assumed conversion (in shares)	8,564			8,240			8,522	8,193
Basic (loss) earnings per share (in dollars per share)	$ (0.16)			$ 0.40			$ 0.02	$ 0.84
Diluted (loss) earnings per share (in dollars per share)	$ (0.16)			$ 0.40			$ 0.02	$ 0.84
Weighted average anti-dilutive employee restricted stock and incentive stock options (in shares)	509			106			421	72