INCOME TAXES - Provision for taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal									$ 0	$ 0	$ 0
State									128	290	171
Current Income Tax Expense (Benefit), Total									128	290	171
Deferred:
Federal									0	0	(3,182)
State									0	0	0
Deferred Income Tax Expense Total									0	0	(3,182)
Tax Expense (Benefit), Total	$ (71)	$ 8	$ 110	$ 81	$ 214	$ 26	$ 27	$ 23	$ 128	$ 290	$ (3,011)