Significant Accounting Policies (Narrative) (Details)	6 Months Ended
	Oct. 31, 2013 USD ($)	Oct. 31, 2013 CAD
Significant Accounting Policies 1	$ 6,339,717
Significant Accounting Policies 2		6,704,947
Significant Accounting Policies 3	2,083,960
Significant Accounting Policies 4		2,083,752
Significant Accounting Policies 5	6,407,248
Significant Accounting Policies 6		6,704,947
Significant Accounting Policies 7	6,607,725
Significant Accounting Policies 8	1,990,910
Significant Accounting Policies 9		2,083,414
Significant Accounting Policies 10	2,053,205
Significant Accounting Policies 11	3,454,839
Significant Accounting Policies 12		3,678,100
Significant Accounting Policies 13	2,283,908
Significant Accounting Policies 14		2,431,500
Significant Accounting Policies 15	2,804,700
Significant Accounting Policies 16		2,804,700
Significant Accounting Policies 17	587,000
Significant Accounting Policies 18		587,000
Significant Accounting Policies 19	476,703
Significant Accounting Policies 20	$ 43,594