Note 8 - Income Taxes (Details Narrative) $ in Thousands	12 Months Ended
Dec. 31, 2018 USD ($)
Series H - Preferred stock, outstanding shares
Net operating loss carryforward	$ 84,354
Net operating loss carryforward, expiration	These carryforwards expire from 2019 through 2038

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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