GOODWILL AND INTANGIBLE ASSETS - NET - DEFINITE-LIVED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying	$ 1,081		$ 1,081
Accumulated Amortization	(1,039)		(1,036)
Definitive-lived intangible assets, net	42		45
Amortization expense	$ 3	$ 14
Patient base
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	8 months 12 days
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying	$ 611		611
Accumulated Amortization	(611)		(611)
Definitive-lived intangible assets, net	$ 0		0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	2 years 7 months 6 days
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying	$ 470		470
Accumulated Amortization	(428)		(425)
Definitive-lived intangible assets, net	$ 42		$ 45