SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Gross revenue	$ 17,682	$ 15,883
Contractual allowance and adjustments	(8,985)	(8,452)
Service revenue, net	8,697	7,431
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	43	53
Service revenue, net	43	53
Medicare [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	3,838	2,882
Service revenue, net	3,838	2,882
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	234	411
Contractual allowance and adjustments		(3)
Service revenue, net	234	408
Third-Party Payor [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	12,597	11,891
Contractual allowance and adjustments	(8,985)	(8,449)
Service revenue, net	3,612	3,442
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	56	426
Service revenue, net	56	426
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	16,768	15,663
Contractual allowance and adjustments	(8,985)	(8,452)
Service revenue, net	7,783	7,211
Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	914	220
Service revenue, net	$ 914	$ 220