Note 10 - Investment Securities (Details) - Held-to-Maturity Securities (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	$ 25,930,000	$ 20,138,000
Held-to-Maturity Securities - Gross Unrealized Gains	139,000	195,000
Held-to-Maturity Securities - Gross Unrealized Losses	(1,284,000)	(47,000)
Held-to-Maturity Securities - Fair Value	24,784,858	20,285,670
Federal Farm Credit Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	5,444,000	3,444,000
Held-to-Maturity Securities - Gross Unrealized Gains	0	1,000
Held-to-Maturity Securities - Gross Unrealized Losses	(340,000)	(16,000)
Held-to-Maturity Securities - Fair Value	5,104,000	3,429,000
Federal Home Loan Bank Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	6,591,000	4,591,000
Held-to-Maturity Securities - Gross Unrealized Gains	1,000	5,000
Held-to-Maturity Securities - Gross Unrealized Losses	(396,000)	(18,000)
Held-to-Maturity Securities - Fair Value	6,196,000	4,578,000
Federal Home Loan Mortgage [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	1,997,000
Held-to-Maturity Securities - Gross Unrealized Gains	0
Held-to-Maturity Securities - Gross Unrealized Losses	(134,000)
Held-to-Maturity Securities - Fair Value	1,863,000
Corporation Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost		500,000
Held-to-Maturity Securities - Gross Unrealized Losses		(2,000)
Held-to-Maturity Securities - Fair Value		498,000
Federal National Mortgage Association [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	9,498,000	9,500,000
Held-to-Maturity Securities - Gross Unrealized Gains	18,000	49,000
Held-to-Maturity Securities - Gross Unrealized Losses	(412,000)	(10,000)
Held-to-Maturity Securities - Fair Value	9,104,000	9,539,000
Municipal Bond [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	587,000	64,000
Held-to-Maturity Securities - Gross Unrealized Gains	5,000	0
Held-to-Maturity Securities - Gross Unrealized Losses	0	0
Held-to-Maturity Securities - Fair Value	592,000	64,000
Total Bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	24,117,000	18,099,000
Held-to-Maturity Securities - Gross Unrealized Gains	24,000	55,000
Held-to-Maturity Securities - Gross Unrealized Losses	(1,282,000)	(46,000)
Held-to-Maturity Securities - Fair Value	22,859,000	18,108,000
Federal Home Loan Mortgage Corporation [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	814,000	965,000
Held-to-Maturity Securities - Gross Unrealized Gains	49,000	65,000
Held-to-Maturity Securities - Gross Unrealized Losses	(1,000)	0
Held-to-Maturity Securities - Fair Value	862,000	1,030,000
Federal National Mortgage Association Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	717,000	781,000
Held-to-Maturity Securities - Gross Unrealized Gains	56,000	64,000
Held-to-Maturity Securities - Gross Unrealized Losses	0	0
Held-to-Maturity Securities - Fair Value	773,000	845,000
Government National Mortgage Corporation [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	282,000	293,000
Held-to-Maturity Securities - Gross Unrealized Gains	10,000	11,000
Held-to-Maturity Securities - Gross Unrealized Losses	(1,000)	(1,000)
Held-to-Maturity Securities - Fair Value	291,000	303,000
Total Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity Securities - Amortized Cost	1,813,000	2,039,000
Held-to-Maturity Securities - Gross Unrealized Gains	115,000	140,000
Held-to-Maturity Securities - Gross Unrealized Losses	(2,000)	(1,000)
Held-to-Maturity Securities - Fair Value	$ 1,926,000	$ 2,178,000