Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items]
Aggregate Fair Value	$ 136,994,000	$ 102,956,000
Amortized/Adjusted Cost Basis	47,976,000	50,492,000
Pretax Unrealized Gains	89,018,000	52,464,000
U.S. Treasury Notes and Bills [Member]
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items]
Aggregate Fair Value		800,000
Amortized/Adjusted Cost Basis		800,000
Common Stock [Member]
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items]
Aggregate Fair Value	129,699,000	94,061,000
Amortized/Adjusted Cost Basis	43,042,000	44,761,000
Pretax Unrealized Gains	86,657,000	49,300,000
Fixed Income Securities [Member]
Note 2 - Summary of Significant Accounting Policies (Details) - Investment in Financial Instruments [Line Items]
Aggregate Fair Value	7,295,000	8,095,000
Amortized/Adjusted Cost Basis	4,934,000	4,931,000
Pretax Unrealized Gains	$ 2,361,000	$ 3,164,000