Note 10 - Investment Securities (Detail) - Maturities of Securities (USD $)	Sep. 30, 2012	Mar. 31, 2012
Held to Maturity - Fair Value - Equity securities	$ 21,786,178	$ 17,606,748
Held to Maturity - Fair Value - Total	21,786,178	17,606,748
Available for Sale - Amortized Cost - Total	228,427	237,096
Mutual Fund Shares [Member]
Available for Sale - Amortized Cost - One year or less	0	0
Available for Sale - Fair Value - One year or less	0	0
Available for Sale - Amortized Cost - After one year through five years	0	0
Available for Sale - Fair Value - After one year through five years	0	0
Available for Sale - Amortized Cost - After five years through ten years	0	0
Available for Sale - Fair Value - After five years through ten years	0	0
Available for Sale - Amortized Cost - After ten years	0	0
Available for Sale - Fair Value - After ten years	0	0
Available for Sale - Amortized Cost - Equity securities	229,000	237,000
Available for Sale - Fair Value - Equity securities	240,000	242,000
Available for Sale - Amortized Cost - Total	229,000	237,000
Available for Sale - Fair Value - Total	240,000	242,000
Equity Securities [Member] | End of Period [Member]
Held to Maturity - Amortized Cost - Equity securities		0
Held to Maturity - Fair Value - Equity securities		0
Held to Maturity - Fair Value - Total		0
End of Period [Member]
Held to Maturity - Amortized Cost - One year or less	64,000	104,000
Held to Maturity - Fair Value - One year or less	64,000	104,000
Held to Maturity - Amortized Cost - After one year through five years	507,000	510,000
Held to Maturity - Fair Value - After one year through five years	534,000	532,000
Held to Maturity - Amortized Cost - After five years through ten years	5,299,000	3,444,000
Held to Maturity - Fair Value - After five years through ten years	5,334,000	3,449,000
Held to Maturity - Amortized Cost - After ten years	15,581,000	13,399,000
Held to Maturity - Fair Value - After ten years	15,854,000	13,521,000
Held to Maturity - Fair Value - Equity securities	21,786,000	17,606,000
Held to Maturity - Amortized Cost - Total	21,451,000	17,457,000
Held to Maturity - Fair Value - Total	$ 21,786,000	$ 17,606,000