STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) - 2015 EIP Plan - USD ($) $ / shares in Units, $ in Thousands						3 Months Ended
	Feb. 25, 2020	Nov. 05, 2019	Mar. 04, 2019	Feb. 27, 2018	Mar. 23, 2017	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Mar. 22, 2017	Jun. 26, 2015
Stock options
Aggregate number of shares of common stock available for awards					2,750,000				400,000	400,000
Nonemployee Directors
Additional disclosures
Maximum annual limit for grants (in shares)					500,000
Other Individuals
Additional disclosures
Maximum annual limit for grants (in shares)					1,000,000
Stock Options
Stock options
Vesting percentage of awards	33.33%		33.33%	33.33%
Vesting period	3 years		3 years	3 years
Unrecognized compensation cost
Unamortized compensation cost						$ 1,072
Future amortization of stock based compensation
Remainder of 2020						582
2021						367
2022						111
2023						$ 12
Number of Options
Outstanding at beginning of period (in shares)						322,279
Granted (in shares)	344,568		240,540	122,608		344,568
Exercisable (in shares)						(119,923)
Forfeited (in shares)						(3,378)
Outstanding at end of period (in shares)						543,546
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share)						$ 9.41
Granted (in dollars per share)	$ 7.06		$ 8.39			7.06
Exercisable (in dollars per share)						9.87
Forfeited (in dollars per share)						8.07
Outstanding at end of period (in dollars per share)						7.83
Weighted Average Fair Value
Outstanding at beginning of period (in dollars per share)						4.72
Granted (in dollars per share)	$ 2.01		$ 3.76	$ 7.55		2.01
Exercisable (in dollars per share)						5.05
Forfeited (in dollars per share)						3.76
Outstanding at end of period (in dollars per share)						2.94
Weighted Average Exercise Price Of Outstanding Options						$ 8.86
Options Outstanding, Weighted Average Remaining Contractual Life						5 years 5 months 19 days
Options Exercisable, Number of options						293,792
Options Exercisable, Weighted Average Exercise Price						$ 10.78
Options Exercisable, Weighted Average Remaining Contractual Life						3 years 9 months 4 days
Aggregate fair value	$ 693		$ 904	$ 926
Stock options outstanding - nonvested and exercisable						837,338		496,148
Assumptions and Methodology
Weighted average volatility rate (as a percent)	53.91%		55.23%	71.94%
Risk-free interest rate ( as a percent)	1.41%		2.49%	2.53%
Dividend rate ( as a percent)	7.13%		0.00%	0.00%
Expected life (in years)	4 years		4 years	4 years
Stock Options | General and Administrative Expense
Stock options
Amortization expense						$ 205	$ 181
Stock Options | Exercise Price - $13.365
Weighted Average Exercise Price
Granted (in dollars per share)		$ 13.365
Stock Options | Exercise Price - $8.065
Weighted Average Exercise Price
Granted (in dollars per share)		8.065
Stock Options | John C. Wobensmith
Stock options
Vesting percentage of awards					33.33%
Vesting period					3 years
Number of Options
Granted (in shares)					133,000
Weighted Average Exercise Price
Granted (in dollars per share)		$ 10.805
Weighted Average Fair Value
Granted (in dollars per share)					$ 6.41
Aggregate fair value					$ 853
Assumptions and Methodology
Weighted average volatility rate (as a percent)					79.80%
Risk-free interest rate ( as a percent)					1.68%
Dividend rate ( as a percent)					0.00%
Expected life (in years)					3 years 9 months 11 days