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STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) - 2015 EIP Plan - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Feb. 23, 2021	Feb. 25, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 19, 2021	Mar. 18, 2021
Stock options
Aggregate number of shares of common stock available for awards							4,750,000	2,750,000
Stock Options
Stock options
Vesting percentage of awards	33.33%
Vesting period	3 years
Unrecognized compensation cost
Unamortized compensation cost			$ 520		$ 520
Future amortization of stock based compensation
Remainder of 2021			153		153
2022			278		278
2023			81		81
2024			$ 8		$ 8
Number of Options
Outstanding at beginning of period (in shares)					837,338
Granted (in shares)	118,552	344,568			118,552
Exercised (in shares)					(39,603)
Outstanding at end of period (in shares)			916,287		916,287
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)					$ 8.86
Granted (in dollars per share)	$ 9.91	$ 7.06			9.91
Exercised (in dollars per share)					8.37
Outstanding at end of period (in dollars per share)			$ 9.02		9.02
Weighted Average Fair Value
Outstanding at beginning of period (in dollars per share)					4.02
Granted (in dollars per share)	$ 4.33				4.33
Exercised (in dollars per share)					3.46
Outstanding at end of period (in dollars per share)			$ 4.08		$ 4.08
Options outstanding and unvested			427,318		427,318
Weighted Average Exercise Price Of Outstanding and Unvested Options					$ 8.04
Options Outstanding and Unvested, Weighted Average Remaining Contractual Life					4 years 6 months
Options Exercisable, Number of options			488,969		488,969
Options Exercisable, Weighted Average Exercise Price			$ 9.88		$ 9.88
Options Exercisable, Weighted Average Fair Value (in dollars per share)					$ 5.04
Options Exercisable, Weighted Average Remaining Contractual Life					2 years 10 months 6 days
Aggregate fair value	$ 513	$ 693
Stock options outstanding			916,287		916,287
Assumptions and Methodology
Weighted average volatility rate (as a percent)	60.91%
Risk-free interest rate ( as a percent)	0.41%
Dividend rate ( as a percent)	0.98%
Expected life (in years)	4 years
Stock Options | General and Administrative Expense
Stock options
Amortization expense			$ 152	$ 195	$ 483	$ 592

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