SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Allowance for doubtful accounts, Beginning balance	$ (2,484)
Adjustment for allowance for doubtful accounts	(80)	$ (287)
Bad debt expense	2
Total charges	78
Other	536
Allowance for doubtful accounts, Ending balance	(2,026)
Medicaid [Member]
Adjustment for allowance for doubtful accounts	(7)	(8)
Medicare [Member]
Adjustment for allowance for doubtful accounts	(24)	(99)
Third-Party Payor [Member]
Adjustment for allowance for doubtful accounts	$ (49)	$ (180)