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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for doubtful accounts, Beginning balance			$ (1,708)
less allowance for doubtful accounts	$ (262)	$ (173)	(723)	$ (399)
Allowances for doubtful accounts	(1,046)	(823)	(3,162)	(2,578)
Bad debt expense			(1)
Total charges			(724)
Allowance for doubtful accounts, Ending balance	(2,432)		(2,432)
Medicaid [Member]
less allowance for doubtful accounts	(10)	(15)	(22)	(38)
Allowances for doubtful accounts	(10)	(15)	(22)	(38)
Medicare [Member]
less allowance for doubtful accounts	(56)	(43)	(183)	(105)
Allowances for doubtful accounts	(373)	(288)	(1,217)	(703)
Third Party Payer [Member]
less allowance for doubtful accounts	(196)	(115)	(518)	(256)
Allowances for doubtful accounts	$ (490)	$ (289)	$ (1,297)	$ (639)