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Business Description, Basis of Presentation and Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	9 Months Ended		57 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Cash and cash equivalents	$ 5,583	$ 2,010	$ 5,583	$ 4,064	$ 11,211
Working capital	15,617		15,617
Net cash used in operating activities	309	$ 6,570
Increase of cash used in operating activities	$ 6,261
Litigation for Intellectual Property Infringement [Member]
Loss Contingencies [Line Items]
Litigation settlement expense			$ 19,157

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Amount of increase (decrease) in the amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount of a company's current assets minus the amount of its current liabilities.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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