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LOSS 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, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net loss – Basic and Diluted	$ (3,007)	$ (44,415)	$ (1,720)
Weighted-average shares outstanding - Basic (in shares)	20,860	20,597	19,452
Effect of dilutive securities:
Stock options and other stock awards (in shares)	0	0	0
Weighted-average shares outstanding – Diluted (in shares)	20,860	20,597	19,452
Basic loss per common share (usd per share)	$ (0.14)	$ (2.16)	$ (0.09)
Diluted loss per common share (usd per share)	$ (0.14)	$ (2.16)	$ (0.09)
Antidilutive shares (in shares)	2,167	2,120	1,869

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