Note 6 - Investment Securities Available for Sale (Tables)

12 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

			Gross		Gross
	Amortized		unrealized		unrealized		Fair
March 31, 2017	cost		gains		losses		value
U.S. government agencies	$	3,525,373	$	323	$	13,393	$	3,512,303
Municipal bonds		17,096,477		21,858		950,496		16,167,839
Corporate bonds		2,000,000		-		83,478		1,916,522
Mortgage-backed securities		81,994,305		65,094		1,226,935		80,832,464
	$	104,616,155	$	87,275	$	2,274,302	$	102,429,128

			Gross		Gross
	Amortized		unrealized		unrealized		Fair
March 31, 2016	cost		gains		losses		value
U.S. government agencies	$	10,519,126	$	20,622	$	6,752	$	10,532,996
Municipal bonds		4,061,599		51,105		140		4,112,564
Corporate bonds		2,000,000		-		101,360		1,898,640
Mortgage-backed securities		53,939,706		300,731		300,237		53,940,200
	$	70,520,431	$	372,458	$	408,489	$	70,484,400

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available for Sale
	March 31, 2017				March 31, 2016
	Amortized		Fair		Amortized		Fair
	cost		value		cost		value
Maturing
Within one year	$	-	$	-	$	731,217	$	731,060
Over one to five years		4,234,642		4,240,740		3,268,217		3,287,589
Over five to ten years		5,538,313		5,404,810		9,830,135		9,751,610
Over ten years		12,848,895		11,951,114		2,751,156		2,773,941
Mortgage-backed, in monthly installments		81,994,305		80,832,464		53,939,706		53,940,200
	$	104,616,155	$	102,429,128	$	70,520,431	$	70,484,400

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	Less than 12 months				12 months or longer				Total
	Gross unrealized		Fair		Gross unrealized		Fair		Gross unrealized		Fair
March 31, 2017	losses		value		losses		value		losses		value
U.S. government agencies	$	13,393	$	3,256,964	$	-	$	-	$	13,393	$	3,256,964
Municipal bonds		950,496		13,982,251		-		-		950,496		13,982,251
Corporate bonds		-		-		83,478		1,916,522		83,478		1,916,522
Mortgage-backed securities		941,183		66,953,532		285,752		7,016,746		1,226,935		73,970,278
	$	1,905,072	$	84,192,747	$	369,230	$	8,933,268	$	2,274,302	$	93,126,015

	Less than 12 months				12 months or longer				Total
	Gross unrealized		Fair		Gross unrealized		Fair		Gross unrealized		Fair
March 31, 2016	losses		value		losses		value		losses		value
U.S. government agencies	$	6,752	$	2,244,157	$	-	$	-	$	6,752	$	2,244,157
Municipal bonds		140		480,168		-		-		140		480,168
Corporate bonds		-		-		101,360		1,898,640		101,360		1,898,640
Mortgage-backed securities		33,080		4,367,962		267,157		20,274,037		300,237		24,641,999
	$	39,972	$	7,092,287	$	368,517	$	22,172,677	$	408,489	$	29,264,964