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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, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments $ 7,431 $ 4,095
less allowance for doubtful accounts (1,339) (968)
Net sales 6,092 3,127
Medicaid [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 53 28
less allowance for doubtful accounts (53) (28)
Medicare [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 2,882 1,669
less allowance for doubtful accounts (387) (251)
Net sales 2,495 1,418
Self-Pay [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 408 34
Net sales 408 34
Third Party Payer [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 3,442 1,725
less allowance for doubtful accounts (899) (689)
Net sales 2,543 1,036
Contract Diagnostic Services [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 426 595
Net sales 426 595
Clinical Research Grants and Other [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 220 44
Net sales 220 44
Service revenue, net [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments 7,211 4,051
less allowance for doubtful accounts (1,339) (968)
Net sales 5,872 3,083
Service revenue, net [Member] | Services Revenue, Net [Member]    
Disaggregation of Revenue [Line Items]    
Revenue, net of contractual allowances and adjustments $ 7,211 $ 4,051