Note 10 - Investment Securities (Detail) - Maturities of Securities (USD $)	Jun. 30, 2012	Mar. 31, 2012
Held to Maturity - Amortized Cost - One year or less	$ 104,000	$ 104,000
Held to Maturity - Fair Value - One year or less	104,000	104,000
Available for Sale - Amortized Cost - One year or less	0	0
Available for Sale - Fair Value - One year or less	0	0
Held to Maturity - Amortized Cost - After one year through five years	504,000	510,000
Held to Maturity - Fair Value - After one year through five years	527,000	532,000
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
Held to Maturity - Amortized Cost - After five years through ten years	6,005,000	3,444,000
Held to Maturity - Fair Value - After five years through ten years	6,023,000	3,449,000
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
Held to Maturity - Amortized Cost - After ten years	15,200,000	13,399,000
Held to Maturity - Fair Value - After ten years	15,477,000	13,521,000
Available for Sale - Amortized Cost - After ten years	0	0
Available for Sale - Fair Value - After ten years	0	0
Held to Maturity - Fair Value - Equity securities	22,131,230	17,606,748
Held to Maturity - Amortized Cost - Total	21,813,000	17,457,000
Held to Maturity - Fair Value - Total	22,131,230	17,606,748
Available for Sale - Amortized Cost - Total	232,356	237,096
Available for Sale - Fair Value - Total	241,000	242,000
Equity Securities [Member]
Held to Maturity - Amortized Cost - Equity securities		0
Held to Maturity - Fair Value - Equity securities		0
Available for Sale - Amortized Cost - Equity securities	232,000	237,000
Available for Sale - Fair Value - Equity securities	241,000	242,000
Held to Maturity - Fair Value - Total		$ 0