SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for doubtful accounts, Beginning balance			$ (2,484)
Adjustment for allowance for doubtful accounts	$ (87)	$ 100	(167)	$ (187)
Bad debt expense			2
Total charges			165
Other			536
Allowance for doubtful accounts, Ending balance	(2,113)		(2,113)
Medicaid [Member]
Adjustment for allowance for doubtful accounts	(6)	10	(13)
Medicare [Member]
Adjustment for allowance for doubtful accounts	(27)	110	(51)
Third-Party Payor [Member]
Adjustment for allowance for doubtful accounts	$ (54)	$ (20)	$ (103)