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NET SALES SERVICE REVENUE AND ACCOUNTS RECEIVABLE (Schedule of Receivables) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts receivable, gross	$ 2,103	$ 1,857
Less allowance for doubtful accounts	(1,351)	(1,127)
Accounts receivable, net	752	730
Medicaid [Member]
Accounts receivable, gross	37	37
Medicare [Member]
Accounts receivable, gross	774	256
Self-Pay [Member]
Accounts receivable, gross	103	53
Third-Party Payor [Member]
Accounts receivable, gross	797	1,066
Contract Diagnostic Services [Member]
Accounts receivable, gross	392	445
Clinical Research Grants and Other [Member]
Accounts receivable, gross

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For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

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