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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Receivables) (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Accounts receivable, gross $ 3,125 $ 2,398
Less allowance for doubtful accounts (2,432) (1,708)
Accounts receivable, net 693 690
Medicaid [Member]    
Accounts receivable, gross 99 82
Medicare [Member]    
Accounts receivable, gross 764 633
Self-Pay [Member]    
Accounts receivable, gross 75 108
Third Party Payer [Member]    
Accounts receivable, gross 2,071 1,382
Contract Diagnostic Services [Member]    
Accounts receivable, gross $ 116 $ 193