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Note 7 - Income Taxes (Details) - Deferred Tax Asset Balance (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Tax Asset Balance [Abstract]
Deferred tax asset (current portion)	$ 26us-gaap_DeferredTaxAssetsNetCurrent	$ 31us-gaap_DeferredTaxAssetsNetCurrent
Deferred tax asset, net of current portion	269us-gaap_DeferredTaxAssetsNetNoncurrent	329us-gaap_DeferredTaxAssetsNetNoncurrent
Accrued liabilities (non-current deferred tax liability)	(71)	(39)
Net deferred tax asset after valuation allowance	$ 224us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 321us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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- Definition

Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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