Note 4 - Long-Term Debt (Details) (USD $)	Mar. 31, 2014	Sep. 30, 2013 Credit Facility [Member]	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2014 Maximum [Member]
Note 4 - Long-Term Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 50,000,000	$ 75,000,000
Line of Credit Facility, Amount Outstanding	0
Letters of Credit Outstanding, Amount	8,300,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 41,700,000
Long-term Debt, Weighted Average Interest Rate		0.99%