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STOCK BASED COMPENSATION - Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Aggregate Intrinsic Value
Stock based compensation expense	$ 0	$ 20	$ 26	$ 45
Restricted Stock Units
Restricted Stock Units
Vesting period			5 years
Restricted Stock Units
Restricted stock units, December 31, 2019 (in shares)			37
Issued (in shares)			(37)
Restricted stock units, September 30, 2020 (in shares)	0		0		37
Weighted-Average Grant Date Fair Value
Restricted stock units, December 31, 2019 (in dollars per share)			$ 5.23
Restricted stock units, September 30, 2020 (in dollars per share)	$ 0.00		$ 0.00		$ 5.23
Weighted Average Remaining Contractual Life
Restricted stock units			0 years		4 months 17 days
Aggregate Intrinsic Value
Restricted stock units					$ 178
Stock price	$ 5.55		$ 5.55		$ 4.75
Vested (in shares)			37
Restricted Stock Units | Fourth anniversary of the grant date
Restricted Stock Units
Vesting (as a percent)			50.00%
Restricted Stock Units | Fifth anniversary of the grant date
Restricted Stock Units
Vesting (as a percent)			50.00%

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