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NET INCOME (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, $ 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
Net income (loss)	$ 1,998	$ (11,246)	$ (137)	$ (5,171)	$ (5,711)	$ (1,709)	$ (9,385)	$ (12,591)
Weighted average common shares outstanding:
Basic	23,222,045			22,926,764			23,152,776	22,901,558
Dilutive common stock options, restricted stock unit awards and restricted stock awards	115,858
Diluted	23,337,903			22,926,764			23,152,776	22,901,558
Basic income (loss) per share of common stock	$ 0.09			$ (0.23)			$ (0.41)	$ (0.55)
Diluted income (loss) per share of common stock	$ 0.09			$ (0.23)			$ (0.41)	$ (0.55)
Restricted stock units
Weighted average common shares outstanding:
Dilutive common stock options, restricted stock unit awards and restricted stock awards	115,858
Stock options
Weighted average common shares outstanding:
Dilutive common stock options, restricted stock unit awards and restricted stock awards	0
Restricted stock
Weighted average common shares outstanding:
Dilutive common stock options, restricted stock unit awards and restricted stock awards	0

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