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Note 2 - Income Taxes
6 Months Ended
Sep. 30, 2013
Income Tax Disclosure [Abstract]  
Income Tax Disclosure [Text Block]

2. Income Taxes


The tax effect of temporary differences, primarily asset reserves, stock based compensation and accrued liabilities, gave rise to the Company's deferred tax asset in the accompanying September 30, 2013 and March 31, 2013 consolidated balance sheets. Deferred income taxes are recognized for the tax consequence of such temporary differences at the enacted tax rate expected to be in effect when the differences reverse.


The income tax provisions for the respective three-month and six-month periods ended September 30, 2013 and 2012 differ from the federal statutory rate primarily as a result of the effect of state income taxes.