SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Receivables) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts receivable, gross	$ 2,398	$ 1,857
Less allowance for doubtful accounts	(1,708)	(1,127)
Accounts receivable, net	690	730
Medicaid [Member]
Accounts receivable, gross	82	37
Medicare [Member]
Accounts receivable, gross	633	256
Self-Pay [Member]
Accounts receivable, gross	108	53
Third-Party Payor [Member]
Accounts receivable, gross	1,382	1,066
Contract Diagnostic Services [Member]
Accounts receivable, gross	$ 193	$ 445