STOCK-BASED COMPENSATION (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) plan $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($)	May 31, 2015 shares
Stock-based compensation
Number of equity incentive plans | plan	1
Related excess tax benefit | $	$ 0	$ 0
Vesting period	4 years
Restricted Stock
Stock-based compensation
Unrecognized compensation expense related to unvested restricted stock award | $	$ 1,900
Weighted average recognized period	1 year 10 months 24 days
Fair value of share vested | $	$ 700	$ 1,700
Weighted average grant date fair value | $ / shares	$ 2.29	$ 2.07
Restricted Stock | Service vesting
Stock-based compensation
Granted (in shares)	654,857
Vested (in shares)	375,515
Weighted average grant date fair value | $ / shares	$ 2.41	$ 2.65
Vesting period	3 years
Restricted Stock | Modified service vesting
Stock-based compensation
Granted (in shares)	62,962
Vested (in shares)	62,962	210,668
Cumulative effect of compensation expense reversal | $	$ 200	$ 300
Restricted Stock | Market-based vesting
Stock-based compensation
Granted (in shares)	21,500
Weighted average grant date fair value | $ / shares	$ 1.79	$ 1.72
2015 Plan | Restricted Stock
Stock-based compensation
Stock based award, number of shares authorized for issuance				1,000,000
Stock based award, number of shares available for future award	973,335
2015 Plan | Restricted Stock | Service vesting
Stock-based compensation
Granted (in shares)	358,613
Weighted average grant date fair value | $ / shares	$ 2.35
Vesting period	3 years
2015 Plan | Performance-Based Shares
Stock-based compensation
Shares granted ,value | $	$ 1,700
Vesting period	2 years
2015 Plan | Performance-Based Shares | Maximum
Stock-based compensation
Award payout range	200
2015 Plan | Performance-Based Shares | Minimum
Stock-based compensation
Award payout range	50
2015 Plan | Liabilities-Classified Awards | Service vesting
Stock-based compensation
Initial value | $	$ 0	$ 0	$ 900
Vesting period			2 years
2015 Plan | Liabilities-Classified Awards | Service vesting | Other long-term liabilities
Stock-based compensation
Liability | $		$ 200
Outside of 2015 Plan | Restricted Stock
Stock-based compensation
Granted (in shares)	143,000	967,029
Outside of 2015 Plan | Restricted Stock | Service vesting
Stock-based compensation
Vesting period	3 years
Outside of 2015 Plan | Restricted Stock | Modified service vesting
Stock-based compensation
Granted (in shares)	21,500
Vesting period	3 years
Common stock price goals | $ / shares	$ 5.00
Threshold consecutive trading days	30 days
Grant Date Fair Value One | Restricted Stock | Service vesting
Stock-based compensation
Granted (in shares)	21,500
Weighted average grant date fair value | $ / shares	$ 2.60
Grant Date Fair Value Two | Restricted Stock | Service vesting
Stock-based compensation
Granted (in shares)	100,000
Weighted average grant date fair value | $ / shares	$ 1.95
General and administrative expenses
Stock-based compensation
Stock-based compensation expense | $	$ 1,600	$ 1,200
Director | Restricted Stock | Service vesting
Stock-based compensation
Granted (in shares)	149,639
Weighted average grant date fair value | $ / shares	$ 2.45