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Note 5 - Income Taxes	3 Months Ended
	Mar. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	5. Income taxes There is no provision for income taxes because the Company and its subsidiaries were in a cumulative loss position for the three months ended March 31, 2016 and 2017. The Company recorded a full valuation allowance against deferred tax assets for all periods presented. No material unrecognized tax benefits and related interest and penalties were recorded in any of the periods presented.

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- References

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- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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