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Business and Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accounting Policies [Abstract]
Recognized revenue - Royalty Sale	$ 0	$ 408
Cash and cash equivalents held in brokerage accounts and foreign banks	425
Current assets in United States Treasury Securities	$ 6,325
Potentially dilutive shares related to outstanding common stock options	4,373	4,373

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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