Common Stock (Narrative) (Details)	12 Months Ended
	Apr. 30, 2014 USD ($) M Y	Apr. 30, 2014 CAD
Common Stock 1	1,465,000	1,465,000
Common Stock 2		3,662,500
Common Stock 3	3,579,335
Common Stock 4		2.50
Common Stock 5	$ 2.44
Common Stock 6	$ 3.25
Common Stock 7	732,500	732,500
Common Stock 8	12.50%	12.50%
Common Stock 9	42	42
Common Stock 10	6,860,000	6,860,000
Common Stock 11	15.00%	15.00%
Common Stock 12	1.49
Common Stock 13	1.38
Common Stock 14	1,032,641	1,032,641
Common Stock 15	455,163	455,163
Common Stock 16	$ 1.25
Common Stock 17	1.87
Common Stock 18	485,726	485,726
Common Stock 19	2,096,096	2,096,096
Common Stock 20	940,376
Common Stock 21	263,337
Common Stock 22	609,817
Common Stock 23	627,488
Common Stock 24	1,380,970
Common Stock 25	2.77	2.77
Common Stock 26	3,145,800	3,145,800
Common Stock 27	5,636,170
Common Stock 28		5,505,150
Common Stock 29	1.79
Common Stock 30		1.75
Common Stock 31		2.25
Common Stock 32	220,206	220,206
Common Stock 33		1.75
Common Stock 34	50,000	50,000
Common Stock 35	7,000	7,000
Common Stock 36		2.25
Common Stock 37	110,103	110,103
Common Stock 38	110,103	110,103
Common Stock 39		1.75
Common Stock 40	93,057
Common Stock 41	1,311,141
Common Stock 42	3,773,946
Common Stock 43	1,000,000	1,000,000
Common Stock 44	1,000,000	1,000,000
Common Stock 45	$ 1.50
Common Stock 46	6.00%	6.00%
Common Stock 47	50.00%	50.00%
Common Stock 48	3.00%	3.00%
Common Stock 49	49,146
Common Stock 50	56,250
Common Stock 51	103,814	103,814
Common Stock 52	61,622	61,622
Common Stock 53	700,000	700,000
Common Stock 54	556,401	556,401
Common Stock 55	2,462,365	2,462,365
Common Stock 56	2,458,153	2,458,153
Common Stock 57	72,292	72,292
Common Stock 58	1.99
Common Stock 59		1.98
Common Stock 60	143,861
Common Stock 61	180,870	180,870
Common Stock 62	1.53
Common Stock 63		1.61
Common Stock 64	276,731
Common Stock 65	22,200	22,200
Common Stock 66	1.35
Common Stock 67		1.49
Common Stock 68	29,970
Common Stock 69	288,958	288,958
Common Stock 70	16,200	16,200
Common Stock 71	5.00%	5.00%
Common Stock 72	2,500,000	2,500,000
Common Stock 73	191,066	191,066
Common Stock 74	133,443	133,443
Common Stock 75	75,417	75,417
Common Stock 76	115,649	115,649
Common Stock 77	73,334	73,334
Common Stock 78	88,417	88,417
Common Stock 79	587,427	587,427
Common Stock 80	191,433
Common Stock 81	252,204
Common Stock 82	1.73	1.73
Common Stock 83	1.91	1.91
Common Stock 84	434,518
Common Stock 85	$ 421,726