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STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock (Details) - 2015 EIP Plan - Restricted Stock - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock Awards
Vesting period of awards		3 years
Number of Shares
Vested (in shares)		0	0
Unrecognized compensation cost related to nonvested stock awards
Unrecognized compensation cost		$ 0
General and Administrative Expense
Additional disclosures
Recognized nonvested stock amortization expense	$ 3		$ 6

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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