Note 7 - Financing Arrangements (Details) (USD $)			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 London Interbank Offered Rate (LIBOR) [Member]
Note 7 - Financing Arrangements (Details) [Line Items]
Secured Long-term Debt, Noncurrent	$ 7,000,000
Line of Credit Facility, Remaining Borrowing Capacity	7,000,000
Debt Instrument, Basis Spread on Variable Rate			1.50%
LIBOR Rate	0.15%
Line of Credit Facility, Amount Outstanding	$ 0	$ 0