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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments $ 8,697 $ 7,431
Adjustment for allowance for doubtful accounts 152 (1,339)
Net sales 8,849 6,092
Medicaid [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 43 53
Adjustment for allowance for doubtful accounts (5) (53)
Net sales 38  
Medicare [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 3,838 2,882
Adjustment for allowance for doubtful accounts (58) (387)
Net sales 3,780 2,495
Self-Pay [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 234 408
Net sales 234 408
Third-Party Payor [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 3,612 3,442
Adjustment for allowance for doubtful accounts 215 (899)
Net sales 3,827 2,543
Contract Diagnostic Services [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 56 426
Net sales 56 426
Service revenue, net [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 7,783 7,211
Adjustment for allowance for doubtful accounts 152 (1,339)
Net sales 7,935 5,872
Service revenue, net [Member] | Services Revenue, Net [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 7,783 7,211
Other [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 914 220
Net sales $ 914 $ 220