STOCK-BASED COMPENSATION Defined contribution plan and non-cash employer-matching contributions (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Defined contribution pan, maximum annual contribution per employee percent	15.00%
Defined contribution plan, employer matching contribution percent	3.00%
Share-based compensation arrangement award vesting period	5 years
Expense recognized for the 401(k) plan	$ 155	$ 193	$ 385
Number of shares of the Company's common stock issued (in thousands)	0	116	118
Market value per share of the Company's common stock on contribution date (in dollars)	$ 0.00	$ 2.71	$ 3.65
Non-cash contribution made for employer matching liability	$ 0	$ 314	$ 430
Defined Contribution Plan, Employer Discretionary Contribution Amount	162	0	0
Total contribution made for employer-matching liability	$ 162	$ 314	$ 430