Note 4 - Income Taxes (Details Textual)	9 Months Ended
Sep. 30, 2015 USD ($)
Internal Revenue Service (IRS) [Member] \| Domestic Tax Authority [Member] \| Earliest Tax Year [Member]
Open Tax Year	2011
Internal Revenue Service (IRS) [Member] \| Domestic Tax Authority [Member] \| Latest Tax Year [Member]
Open Tax Year	2014
Internal Revenue Service (IRS) [Member] \| Domestic Tax Authority [Member]
Operating Loss Carryforwards	$ 236,000,000
California Franchise Tax Board [Member] \| State and Local Jurisdiction [Member] \| Earliest Tax Year [Member]
Open Tax Year	2010
California Franchise Tax Board [Member] \| State and Local Jurisdiction [Member] \| Latest Tax Year [Member]
Open Tax Year	2014
California Franchise Tax Board [Member] \| State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 144,000,000
Deferred Tax Assets, Net	0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	0
Unrecognized Tax Benefits	$ 2,800,000

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, before jurisdictional netting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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