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(LOSS) INCOME PER COMMON SHARE - Calculations of Basic and Diluted (Loss) Income per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net (loss) income – Basic and Diluted	$ (44,415)	$ (1,720)	$ 2,154
Weighted-average shares outstanding - Basic (in shares)	20,597	19,452	14,505
Effect of dilutive securities: Stock options and other stock awards (in shares)	0	0	450
Weighted-average shares outstanding – Diluted (in shares)	20,597	19,452	14,955
Basic (loss) income per common share (usd per share)	$ (2.16)	$ (0.09)	$ 0.15
Diluted (loss) income per common share (usd per share)	$ (2.16)	$ (0.09)	$ 0.14
Antidilutive shares (in shares)	2,120	1,869	1,190

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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