Note 4 - Long-term Debt (Detail) (USD $)	6 Months Ended
	Mar. 31, 2013
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 80,000,000
Discounting Rate of Company Reserves	8.00%
Collateral Securities Repledged, Delivered, or Used (in Dollars)	38,129,961
Line of Credit Facility, Interest Rate at Period End	2.20%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Secured Borrowing Base Credit Facility (in Dollars)	$ 35,000,000
Minimum [Member] | National Prime [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Minimum [Member] | LIBOR [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Maximum [Member] | National Prime [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Maximum [Member] | LIBOR [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%