STOCK-BASED COMPENSATION Activity (Details)	12 Months Ended
	Dec. 31, 2019 installment $ / shares shares	Dec. 31, 2018 $ / shares shares	Dec. 31, 2017
Fair Value Assumptions
Vesting period	4 years
Number of installment in which restricted stock will vest if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020 | installment	3
Number of installment in which restricted if the stock will vest stock price goal is achieved after March 31, 2020 and on or prior to March 31, 2021 | installment	2
Date the stock price goal
Fair Value Assumptions
Vesting percentage if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020	0.33%
Vesting percentage if the stock price goal is achieved after March 31, 2020 and on or prior to March 31, 2021	0.67%
Vesting on March 31, 2020
Fair Value Assumptions
Vesting percentage if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020	0.33%
Vesting on March 31, 2021
Fair Value Assumptions
Vesting percentage if the stock price goal is achieved after March 31, 2019 and on or prior to March 31, 2020	0.33%
Vesting percentage if the stock price goal is achieved after March 31, 2020 and on or prior to March 31, 2021	0.33%
Restricted Stock
Number of Shares
Unvested restricted stock and restricted stock units at the beginning of the period (in shares)	193,589
Unvested restricted stock and restricted stock units at the end of the period (in shares)	282,059	193,589
Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock at the beginning of the period (in dollars per share) | $ / shares	$ 2.07
Unvested restricted stock at the end of the period (in dollars per share) | $ / shares	$ 2.29	$ 2.07
Restricted Stock | Service vesting
Number of Shares
Unvested restricted stock and restricted stock units at the beginning of the period (in shares)	634,754
Granted (in shares)	654,857
Vesting (in shares)	(375,515)
Forfeited (in shares)	(54,556)
Unvested restricted stock and restricted stock units at the end of the period (in shares)	922,502	634,754
Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock at the beginning of the period (in dollars per share) | $ / shares	$ 2.65
Granted (in dollars per share) | $ / shares	2.32
Vested (in dollars per share) | $ / shares	3.04
Forfeited (in dollars per share) | $ / shares	2.50
Unvested restricted stock at the end of the period (in dollars per share) | $ / shares	$ 2.41	$ 2.65
Fair Value Assumptions
Vesting period	3 years
Restricted Stock | Modified service vesting
Number of Shares
Granted (in shares)	62,962
Vesting (in shares)	(62,962)	(210,668)
Weighted-Average Grant Date Fair Value per Share
Granted (in dollars per share) | $ / shares	$ 4.30
Restricted Stock | Market-based vesting
Number of Shares
Unvested restricted stock and restricted stock units at the beginning of the period (in shares)	620,457
Granted (in shares)	21,500
Forfeited (in shares)	(21,808)
Unvested restricted stock and restricted stock units at the end of the period (in shares)	620,149	620,457
Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock at the beginning of the period (in dollars per share) | $ / shares	$ 1.72
Granted (in dollars per share) | $ / shares	0.75
Forfeited (in dollars per share) | $ / shares	0.94
Unvested restricted stock at the end of the period (in dollars per share) | $ / shares	$ 1.79	$ 1.72
Fair Value Assumptions
Expected term (years)	2 years 5 months 16 days
Expected volatility	37.00%
Expected dividend yield	0.00%
Risk-free interest rate	2.52%
Restricted Stock | Market-based vesting | Minimum
Fair Value Assumptions
Expected term (years)	2 years 5 months 16 days
Restricted Stock | 2015 Plan | Service vesting
Number of Shares
Granted (in shares)	358,613
Weighted-Average Grant Date Fair Value per Share
Unvested restricted stock at the end of the period (in dollars per share) | $ / shares	$ 2.35
Fair Value Assumptions
Vesting period	3 years
Liabilities-Classified Awards | 2015 Plan | Service vesting
Fair Value Assumptions
Vesting period			2 years