SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Receivables) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts receivable, gross	$ 3,390	$ 3,181
Less allowance for doubtful accounts	(2,354)	(2,484)
Accounts receivable, net	1,036	697
Medicaid [Member]
Accounts receivable, gross	34	45
Medicare [Member]
Accounts receivable, gross	1,124	727
Self-Pay
Accounts receivable, gross	291	139
Third-Party Payor [Member]
Accounts receivable, gross	1,888	2,111
Contract Diagnostic Services [Member]
Accounts receivable, gross	$ 53	$ 159