Note 4 - Long-term Debt (Detail) (USD $)	3 Months Ended
	Dec. 31, 2012
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 80,000,000
Discounting Rate of Company Reserves	8.00%
Secured Borrowing Base Credit Facility (in Dollars)	35,000,000
Collateral Securities Repledged, Delivered, or Used (in Dollars)	$ 39,367,672
Line of Credit Facility, Interest Rate at Period End	2.31%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
National Prime [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
National Prime [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
LIBOR [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.00%
LIBOR [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.75%