Marketable Equity Securities (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Notes to Financial Statements
Vendetta shares sold	2,000,000		3,480,000
Cash proceeds from sale of Vendetta shares	$ 407		$ 666
Vendetta shares received upon exercise of warrants	5,000,000	7,240,000	7,240,000
Fair value of Vendetta Warrants on date of exercise	$ 642		$ 949
Cash paid to exercise Vendetta Warrants	$ 411	$ 578	$ 578

Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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Balance Type:	credit
Period Type:	duration