GOODWILL AND INTANGIBLE ASSETS - NET - DEFINITE-LIVED INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying	$ 1,081	$ 1,061
Accumulated Amortization	(1,036)	(983)
Definitive-lived intangible assets, net	45	78
Amortization expense	$ 53	101	$ 100
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	591
Accumulated Amortization	(611)	(573)
Definitive-lived intangible assets, net	$ 0	18
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	(425)	(410)
Definitive-lived intangible assets, net	$ 45	$ 60