Schedule of Allocation of Share Based Compensation Costs for Deferred Share Units (Details) (USD $)	6 Months Ended
	Oct. 31, 2013
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 1	$ 6,667
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 2	4,167
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 3	13,334
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 4	8,334
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 5	2,082
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 6	2,082
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 7	4,164
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 8	2,354
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 9	74,592
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 10	60,856
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 11	300,327
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 12	323,754
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 13	83,341
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 14	67,105
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 15	317,825
Common Stock Schedule Of Allocation Of Share Based Compensation Costs For Deferred Share Units 16	$ 334,442