SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts, Beginning balance	$ (4,013)
Adjustment for allowance for doubtful accounts	152	$ (1,339)
Bad debt expense	(2)
Write-offs	1,379
Total charges	(150)
Allowance for doubtful accounts, Ending balance	(2,484)	(4,013)
Medicaid [Member]
Adjustment for allowance for doubtful accounts	(5)	(53)
Medicare [Member]
Adjustment for allowance for doubtful accounts	(58)	(387)
Third-Party Payor [Member]
Adjustment for allowance for doubtful accounts	$ 215	$ (899)