Consolidated Condensed Statement of Changes in Shareholders' Equity (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Common stock	Additional paid-in capital	Treasury stock	Retained earnings	Accumulated other comprehensive income/(loss)	Total
Balance at Apr. 30, 2012	$ 1,000	$ 991	$ (1,390)	$ 31,628	$ 85	$ 32,314
Balance (in shares) at Apr. 30, 2012	10,000,000		(103,619)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				1,776		1,776
Change in unrealized gains on securities, net of taxes					27	27
Dividends declared				(1,485)		(1,485)
Balance at Jul. 31, 2012	1,000	991	(1,390)	31,919	112	32,632
Balance (in shares) at Jul. 31, 2012	10,000,000		(103,619)
Balance at Apr. 30, 2013	1,000	991	(1,572)	32,315	251	32,985
Balance (in shares) at Apr. 30, 2013	10,000,000		(123,572)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				1,445		1,445
Change in unrealized gains on securities, net of taxes					(3)	(3)
Purchase of treasury stock			(226)			(226)
Purchase of treasury stock (in shares)			(25,723)			(25,723)
Dividends declared				(1,478)		(1,478)
Balance at Jul. 31, 2013	$ 1,000	$ 991	$ (1,798)	$ 32,282	$ 248	$ 32,723
Balance (in shares) at Jul. 31, 2013	10,000,000		(149,295)