STOCK BASED COMPENSATION - Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Aggregate Intrinsic Value
Stock based compensation expense	$ 21	$ 18	$ 50	$ 43
Restricted Stock Units
Restricted Stock Units
Vesting period			5 years
Restricted Stock Units
Restricted stock units at the beginning of the period (in shares)			165
Awarded (in shares)			5
Released (in shares)
Forfeited (in shares)			(5)
Restricted stock units at the end of the period (in shares)	165		165		165
Weighted-Average Grant Date Fair Value
Restricted stock units at the beginning of the period (in dollars per share)			$ 3.54
Awarded (in dollars per share)			8.81
Released (in dollars per share)
Forfeited (in dollars per share)			11.09
Restricted stock units at the end of the period (in dollars per share)	$ 3.54		$ 3.54		$ 3.54
Weighted Average Remaining Contractual Life
Restricted stock units			1 year 10 months 10 days		2 years 3 months 29 days
Aggregate Intrinsic Value
Restricted stock units	$ 1,320		$ 1,320		$ 1,158
Stock price	$ 8.00		$ 8.00		$ 7.02
Vested (in shares)
Restricted Stock Units | First installment
Restricted Stock Units
Vesting (as a percent)			50.00%
Restricted Stock Units | Second installment
Restricted Stock Units
Vesting (as a percent)			50.00%