Note 9 - Loans (Detail) - Non-Accrual Loans (USD $)	6 Months Ended	12 Months Ended
	Sep. 30, 2012	Mar. 31, 2012
Non-accrual loans:
Impaired loans	$ 7,089,000	$ 8,631,000
Total non-performing loans	7,089,000	8,631,000
Real estate owned	2,358,000	846,000
Non-performing loans as a percentage of loans	7.54%	8.57%
Non-performing assets as a percentage of loans and real estate owned	9.80%	9.34%
Non-performing assets as percentage of total assets	7.11%	7.06%
Non-performing [Member]
Non-accrual loans:
Impaired loans	1,506,000	1,387,000
Total non-performing assets	9,447,000	9,476,000
Residential (One to Four Family) Real Estate [Member]
Non-accrual loans:
Non-accrual loans	2,079,000	2,989,000
Multi-Family and Commercial Real Estate [Member]
Non-accrual loans:
Non-accrual loans	3,130,000	4,255,000
Commercial Loans [Member]
Non-accrual loans:
Non-accrual loans	257,000
Consumer [Member]
Non-accrual loans:
Non-accrual loans	39,000
Home Equity Loans [Member]
Non-accrual loans:
Non-accrual loans	78,000
Total [Member]
Non-accrual loans:
Non-accrual loans	$ 5,583,000	$ 7,244,000