Earnings per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	$ 156,000	$ 297,000	$ 328,000	$ 381,000
Weighted Average Number of Shares Outstanding, Basic			5,161,883	5,265,750
Earnings Per Share, Basic	$ 0.03	$ 0.05	$ 0.06	$ 0.07
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	156,000	297,000	328,000	381,000
Undistributed Earnings Allocated to Participating Securities	(11,000)	(14,000)	(23,000)	(17,000)
Net Income (Loss) Available to Common Stockholders, Basic	$ 145,000	$ 283,000	$ 305,000	$ 364,000
Weighted Average Number of Shares Outstanding, Basic	5,265,750	5,265,750
Earnings Per Share, Basic	$ 0.03	$ 0.05