SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance for doubtful accounts, Beginning balance			$ (1,127)
Allowances for doubtful accounts	$ (173)	$ (57)	(399)	$ (168)
Bad debt expense			5
Total charges			(394)
Allowance for doubtful accounts, Ending balance	(1,521)		(1,521)
Medicaid [Member]
Allowances for doubtful accounts	(15)	(1)	(38)	(5)
Medicare [Member]
Allowances for doubtful accounts	(43)	(30)	(105)	(83)
Self-Pay [Member]
Allowances for doubtful accounts		(6)		(16)
Third-Party Payor [Member]
Allowances for doubtful accounts	$ (115)	$ (20)	$ (256)	$ (64)