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Note 4 - Income Taxes
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]

4. Income Taxes


Provision for income taxes is based upon the estimated annual effective income tax rate. The Company’s effective income tax rate was approximately (1.2)% and (1.0)% for the six months ended June 30, 2014 and 2013, respectively. For the six months ended June 30, 2014, the effective income tax rate differs significantly from the statutory rate primarily due to an increase in the deferred tax asset valuation allowance of approximately $158,000, as well as permanent timing differences between expenses recorded for financial and tax reporting. For the six months ended June 30, 2013, the effective income tax rate differs significantly from the statutory rate primarily due to an increase in the deferred tax asset valuation allowance of approximately $464,000, as well as permanent timing differences between expenses recorded for financial and tax reporting. Although the Company reported a pre-tax loss in the six months ended June 30, 2014 and 2013, it was unable to record a tax benefit in either period due to corresponding changes in the deferred tax asset valuation allowance, causing the effective income tax rate to be negative.