SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Receivables) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts receivable, gross	$ 3,248	$ 2,398
Less allowance for doubtful accounts	(2,674)	(1,708)
Accounts receivable, net	574	690
Medicaid [Member]
Accounts receivable, gross	107	82
Medicare [Member]
Accounts receivable, gross	814	633
Self-Pay [Member]
Accounts receivable, gross	88	108
Third Party Payer [Member]
Accounts receivable, gross	2,203	1,382
Contract Diagnostic Services [Member]
Accounts receivable, gross	$ 36	$ 193