Note 2 - Significant Accounting Policies (Details) - Income tax return jurisdictions subject to examination	12 Months Ended
	Mar. 31, 2013
Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Income Tax Jurisdiction	2009 and beyond
State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Income Tax Jurisdiction	2008 and beyond