SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 2,527	$ 2,111
Adjustment for allowance for doubtful accounts	(80)	(287)
Net sales	2,447	1,824
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	15	13
Adjustment for allowance for doubtful accounts	(7)	(8)
Net sales	8	5
Medicare [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	974	984
Adjustment for allowance for doubtful accounts	(24)	(99)
Net sales	950	885
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	49	47
Net sales	49	47
Third-Party Payor [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	967	900
Adjustment for allowance for doubtful accounts	(49)	(180)
Net sales	918	720
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	2,005	1,944
Adjustment for allowance for doubtful accounts	(80)	(287)
Net sales	1,925	1,657
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	522	167
Net sales	$ 522	$ 167