Earnings per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent		$ 156,000	$ (36,000)	$ 328,000
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	79,000	156,000	(36,000)	328,000
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(5,000)	(11,000)	0	(23,000)
Net Income (Loss) Available to Common Stockholders, Basic	$ 74,000	$ 145,000	$ (36,000)	$ 305,000
Weighted Average Number of Shares Outstanding, Basic	5,265,750	5,265,750	5,265,750	5,265,750
Earnings Per Share, Basic	$ 0.01	$ 0.03	$ (0.01)	$ 0.06