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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock Units (Details) - 2015 EIP Plan - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Feb. 25, 2020	Mar. 04, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Stock Awards
Number of common shares outstanding in respect of RSUs			373,588		326,247
Number of Shares
Balance at the beginning of the period (in shares)			162,096
Granted (in shares)	173,749	106,079	177,911
Vested (in shares)			(50,332)
Forfeited (in shares)			(1,490)
Balance at the end of the period (in shares)			288,185
Weighted Average Fair Value
Balance at the beginning of the period (in dollars per share)			$ 9.26
Granted (in dollars per share)			7.00
Vested (in dollars per share)			9.48
Forfeited (in dollars per share)			8.39
Balance at the end of the period (in dollars per share)			$ 7.83
Weighted-average remaining contractual life			2 years 3 months 7 days
Additional disclosures
Total fair value of shares vested			$ 351	$ 107
Unrecognized compensation cost related to nonvested stock awards
Unrecognized compensation cost			$ 1,557
Weighted-average period for recognition of unrecognized compensation cost			2 years 3 months 7 days
General and Administrative Expense
Additional disclosures
Recognized nonvested stock amortization expense			$ 276	$ 271
Vested RSUs
Number of Shares
Number of shares vested			472,555
Weighted Average Fair Value
Vested (in dollars per share)			$ 11.26
Other Individuals
Stock Awards
Vesting period of awards			3 years