Consolidated Condensed Statement of Changes in Shareholders' Equity (unaudited) (USD $)	Common stock	Additional paid-in capital	Treasury Stock	Retained earnings	Accumulated Other Comprehensive income/(loss)	Total
Balance at Apr. 30, 2011	$ 1,000,000	$ 991,000	$ (444,000)	$ 31,644,000	$ 63,000	$ 33,254,000
Balance (in shares) at Apr. 30, 2011	10,000,000		(25,119)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				2,076,000		2,076,000
Change in unrealized gains on securities, net of taxes					(49,000)	(49,000)
Purchase of treasury stock			(158,000)			(158,000)
Purchase of treasury stock (in shares)			(11,700)
Dividends declared				(1,993,000)		(1,993,000)
Balance at Jul. 31, 2011	1,000,000	991,000	(602,000)	31,727,000	14,000	33,130,000
Balance (in shares) at Jul. 31, 2011	10,000,000		(36,819)
Balance at Apr. 30, 2012	1,000,000	991,000	(1,390,000)	31,628,000	85,000	32,314,000
Balance (in shares) at Apr. 30, 2012	10,000,000		(103,619)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				1,776,000		1,776,000
Change in unrealized gains on securities, net of taxes					27,000	27,000
Purchase of treasury stock
Purchase of treasury stock (in shares)
Dividends declared				(1,485,000)		(1,485,000)
Balance at Jul. 31, 2012	$ 1,000,000	$ 991,000	$ (1,390,000)	$ 31,919,000	$ 112,000	$ 32,632,000
Balance (in shares) at Jul. 31, 2012	10,000,000		(103,619)