SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts, Beginning balance	$ (1,708)
less allowance for doubtful accounts	(968)	$ (584)
Allowances for doubtful accounts	(4,095)	(3,448)
Bad debt expense	(2)
Total charges	(966)
Allowance for doubtful accounts, Ending balance	(2,674)	(1,708)
Medicaid [Member]
less allowance for doubtful accounts	(28)	(50)
Allowances for doubtful accounts	(28)	(50)
Medicare [Member]
less allowance for doubtful accounts	(251)	(150)
Allowances for doubtful accounts	(1,669)	(1,000)
Third Party Payer [Member]
less allowance for doubtful accounts	(689)	(384)
Allowances for doubtful accounts	$ (1,725)	$ (960)