SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Gross revenue	$ 5,564	$ 4,945
Contractual allowance and adjustments	(2,735)	(2,418)
Service revenue, net	2,829	2,527
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Service revenue, net	8	15
Medicare [Member]
Disaggregation of Revenue [Line Items]
Service revenue, net	880	974
Self-Pay
Disaggregation of Revenue [Line Items]
Service revenue, net	80	49
Third-Party Payor [Member]
Disaggregation of Revenue [Line Items]
Service revenue, net	1,100	967
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	4,803	4,423
Contractual allowance and adjustments	(2,735)	(2,418)
Service revenue, net	2,068	2,005
Service revenue, net [Member] | Medicaid [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	8	15
Service revenue, net	8	15
Service revenue, net [Member] | Medicare [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	880	974
Service revenue, net	880	974
Service revenue, net [Member] | Self-Pay
Disaggregation of Revenue [Line Items]
Gross revenue	80	49
Service revenue, net	80	49
Service revenue, net [Member] | Third-Party Payor [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	3,835	3,385
Contractual allowance and adjustments	(2,735)	(2,418)
Service revenue, net	1,100	967
Other [Member]
Disaggregation of Revenue [Line Items]
Service revenue, net	761	522
Other [Member] | Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	761	522
Service revenue, net	$ 761	$ 522