Note 9 - Loans (Details) - Nonaccrual Loans (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Mar. 31, 2012
Non-accrual loans:
Non-accrual Loans	$ 2,316,000	$ 2,816,000
Trouble Debt Restructurings	3,481,000	3,529,000
Total non-performing loans	5,797,000	6,345,000
Real estate owned	2,155,566	2,469,800	846,000
Total non-performing assets	7,953,000	8,815,000
Non-performing loans as a percentage of loans	6.65%	7.08%
Non-performing assets as a percentage of loans and real estate owned	8.91%	9.58%
Non-performing assets as percentage of total assets	6.11%	6.81%
In Non-accrual Status [Member] | Residential (One to Four Family) Real Estate [Member]
Non-accrual loans:
Trouble Debt Restructurings	549,000	550,000
In Non-accrual Status [Member] | Multi-Family and Commercial Real Estate [Member]
Non-accrual loans:
Trouble Debt Restructurings	996,000	1,001,000
In Non-accrual Status [Member] | Commercial Loan [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
In Non-accrual Status [Member] | Consumer Loan [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
In Non-accrual Status [Member] | Home Equity Line of Credit [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
In Non-accrual Status [Member] | Construction [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
In Non-accrual Status [Member]
Non-accrual loans:
Trouble Debt Restructurings	1,545,000	1,551,000
Performing Under Modified Terms [Member] | Residential (One to Four Family) Real Estate [Member]
Non-accrual loans:
Trouble Debt Restructurings	751,000	788,000
Performing Under Modified Terms [Member] | Multi-Family and Commercial Real Estate [Member]
Non-accrual loans:
Trouble Debt Restructurings	1,135,000	1,139,000
Performing Under Modified Terms [Member] | Commercial Loan [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
Performing Under Modified Terms [Member] | Consumer Loan [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
Performing Under Modified Terms [Member] | Home Equity Line of Credit [Member]
Non-accrual loans:
Trouble Debt Restructurings	0	0
Performing Under Modified Terms [Member] | Construction [Member]
Non-accrual loans:
Trouble Debt Restructurings	50,000	51,000
Performing Under Modified Terms [Member]
Non-accrual loans:
Trouble Debt Restructurings	1,936,000	1,978,000
Residential (One to Four Family) Real Estate [Member]
Non-accrual loans:
Non-accrual Loans	894,000	992,000
Multi-Family and Commercial Real Estate [Member]
Non-accrual loans:
Non-accrual Loans	1,187,000	1,302,000
Commercial Loan [Member]
Non-accrual loans:
Non-accrual Loans	186,000	235,000
Consumer Loan [Member]
Non-accrual loans:
Non-accrual Loans	0	0
Home Equity Line of Credit [Member]
Non-accrual loans:
Non-accrual Loans	49,000	287,000
Construction [Member]
Non-accrual loans:
Non-accrual Loans	$ 0	$ 0