Available-for-sale Securities (Details) (USD $)	12 Months Ended
	Apr. 30, 2014
Investment In Marketable Securities Available-for-sale Securities 1	$ 1,000,000
Investment In Marketable Securities Available-for-sale Securities 2	0
Investment In Marketable Securities Available-for-sale Securities 3	(500,000)
Investment In Marketable Securities Available-for-sale Securities 4	500,000
Investment In Marketable Securities Available-for-sale Securities 5	1,000,000
Investment In Marketable Securities Available-for-sale Securities 6	0
Investment In Marketable Securities Available-for-sale Securities 7	(500,000)
Investment In Marketable Securities Available-for-sale Securities 8	$ 500,000