SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Allowance for doubtful accounts, Beginning balance	$ (2,674)
less allowance for doubtful accounts	(266)	$ (204)
Allowances for doubtful accounts	(1,482)	(917)
Bad debt expense	(2)
Total charges	(268)
Allowance for doubtful accounts, Ending balance	(2,942)
Medicaid [Member]
less allowance for doubtful accounts	(8)	(3)
Allowances for doubtful accounts	(9)	(3)
Medicare [Member]
less allowance for doubtful accounts	(79)	(59)
Allowances for doubtful accounts	(524)	(394)
Third Party Payer [Member]
less allowance for doubtful accounts	(179)	(142)
Allowances for doubtful accounts	$ (517)	$ (356)