Earnings per Share (Details) (USD $)	3 Months Ended		9 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent			$ (8,000)	$ 359,000
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	28,000	31,000	(8,000)	359,000
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(2,000)	(2,000)	0	(22,000)
Net Income (Loss) Available to Common Stockholders, Basic	$ 26,000	$ 29,000	$ (8,000)	$ 337,000
Weighted Average Number of Shares Outstanding, Basic	5,265,750	5,265,750	5,265,750	5,265,750
Earnings Per Share, Basic	$ 0.00	$ 0.01	$ 0.00	$ 0.06