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STOCK-BASED COMPENSATION - 2015 EIP Restricted Stock (Details) - 2015 EIP Plan - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Awards
Vesting period of awards	3 years
Number of Shares
Balance at the beginning of the period (in shares)	6,802
Vested (in shares)	0	0
Balance at the end of the period (in shares)	6,802
Weighted Average Fair Value
Balance at the beginning of the period (in dollars per share)	$ 5.20
Balance at the end of the period (in dollars per share)	$ 5.20
Unrecognized compensation cost related to nonvested stock awards
Unrecognized compensation cost	$ 8
Weighted-average period for recognition of unrecognized compensation cost	7 months 17 days
General and Administrative Expense
Additional disclosures
Recognized nonvested stock amortization expense	$ 3	$ 8

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

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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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