Note 9 - Loans (Detail) - Impaired Loans by Portfolio Class (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012
Recorded Investment	$ 8,336,000	$ 8,631,000
Related Valuation Allowance	0	0
Average Recorded Investment	8,349,000	8,546,000
Interest Income Recognized While On Impaired Status	44,859	152,910
Residential (One to Four Family) Real Estate [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Recorded Investment	3,522,000	3,357,000
Unpaid Principal Balance	3,502,000	3,344,000
Related Valuation Allowance		0
Average Recorded Investment	3,461,000	3,443,000
Interest Income Recognized While On Impaired Status	21,000	66,000
Multi-Family and Commercial Real Estate [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Recorded Investment	4,641,000	5,287,000
Unpaid Principal Balance	4,641,000	5,287,000
Related Valuation Allowance		0
Average Recorded Investment	4,695,000	4,853,000
Interest Income Recognized While On Impaired Status	20,000	87,000
Commercial Loans [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Recorded Investment	140,000	0
Unpaid Principal Balance	140,000	0
Related Valuation Allowance	0	0
Average Recorded Investment	140,000	19,000
Interest Income Recognized While On Impaired Status	3,000	0
Home Equity Loans [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Related Valuation Allowance		0
Average Recorded Investment		111,000
Interest Income Recognized While On Impaired Status	0
Consumer [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Recorded Investment	0
Unpaid Principal Balance	0
Related Valuation Allowance	0	0
Average Recorded Investment	0	119,669,000
Interest Income Recognized While On Impaired Status	0	0
Construction [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Recorded Investment	53,000	0
Unpaid Principal Balance	53,000	0
Related Valuation Allowance	0	0
Average Recorded Investment	53,000	0
Interest Income Recognized While On Impaired Status	1,000	0
Total [Member] | Impaired Financing Receivable With No Valuation Allowance [Member]
Recorded Investment	8,356,000	8,644,000
Unpaid Principal Balance	8,336,000	8,631,000
Related Valuation Allowance		0
Average Recorded Investment	8,349,000	8,546,000
Interest Income Recognized While On Impaired Status	$ 45,000	$ 153,000