SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts receivable, gross	$ 3,148	$ 3,181
Less allowance for doubtful accounts	(2,193)	(2,484)
Accounts receivable, net	955	697
Medicaid [Member]
Accounts receivable, gross	34	45
Medicare [Member]
Accounts receivable, gross	1,064	727
Self-Pay [Member]
Accounts receivable, gross	279	139
Third-Party Payor [Member]
Accounts receivable, gross	1,680	2,111
Contract Diagnostic Services and Other [Member]
Accounts receivable, gross	$ 91	$ 159