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Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jul. 31, 2018	May 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Net loss			$ 2,514	$ 5,692	$ 3,505	$ 9,214
Accumulated deficit			(92,341)		(92,341)		$ (88,836)
Net cash used in operating activities					723	$ (8,509)
Cash resources and restricted investments			6,315		6,315
Restricted cash			200		200		$ 200
Right of use asset			2,300		2,300
Lease liability			$ 2,800		2,800
Surface Pharmaceuticals Inc [Member]
Net loss					$ 891
Ownership percentage			30.00%		30.00%
Gain on deconsolidation of Surface Pharmaceuticals					$ 5,320
Number of shares owned			3,500,000		3,500,000
Investment losses			$ 128		$ 230
Investment in surface			$ 5,090		$ 5,090
Surface Series A Stock [Member]
Proceeds from issuance of preferred stock	$ 21,000	$ 21,000
Surface Series A Stock [Member] | Surface Pharmaceuticals Inc [Member]
Ownership percentage			35.00%		35.00%
Share purchase price			$ 3.30		$ 3.30
Restricted Stock Units [Member]
Number of shares vested during the period					202,603	121,344
Deferred Acquisition Obligations, Convertible Note Payable, Stock Options, Unvested RSUs and Warrants [Member]
Antidilutive securities					8,387,347	9,983,548

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