Going Concern (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Going Concern
Accumulated deficit	$ (244,975)	$ (235,537)
Cash and Cash Equivalents, at Carrying Value	$ 6,005	$ 15,045	$ 18,650	$ 28,918

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant