Common Stock (Narrative) (Details) - 3 months ended Jul. 31, 2015	USD ($) yr mo $ / shares shares	CAD yr mo shares
Common Stock 1	12.50%	12.50%
Common Stock 2 | mo	42	42
Common Stock 3	7,860,000	7,860,000
Common Stock 4	15.00%	15.00%
Common Stock 5	$ 0.31
Common Stock 6	$ 0.51
Common Stock 7 | $ / shares	$ 0.45
Common Stock 8	$ 0.50
Common Stock 9	0	0
Common Stock 10	122,750	122,750
Common Stock 11	$ 0
Common Stock 12	1,927
Common Stock 13	151,982
Common Stock 14	195,957
Common Stock 15	$ 971,703
Common Stock 16 | yr	2.4	2.4
Common Stock 17 | shares	1,465,000	1,465,000
Common Stock 18 | CAD		CAD 3,662,500
Common Stock 19	$ 3,579,335
Common Stock 20 | CAD		CAD 2.50
Common Stock 21 | $ / shares	$ 2.44
Common Stock 22 | $ / shares	$ 3.25
Common Stock 23 | shares	732,500	732,500
Common Stock 24	6.00%	6.00%
Common Stock 25	50.00%	50.00%
Common Stock 26	3.00%	3.00%
Common Stock 27	$ 11,580
Common Stock 28	$ 14,973
Common Stock 29	39,366	39,366
Common Stock 30	65,124	65,124
Common Stock 31	0	0
Common Stock 32 | shares	700,000	700,000
Common Stock 33 | shares	468,767	468,767
Common Stock 34	2,434,034	2,434,034
Common Stock 35 | shares	361,326	361,326
Common Stock 36	$ 0.93
Common Stock 37 | CAD		CAD 1.05
Common Stock 38	$ 336,033
Common Stock 39 | shares	36,500	36,500
Common Stock 40	$ 0.54
Common Stock 41 | CAD		CAD 0.67
Common Stock 42	$ 19,710
Common Stock 43 | shares	669,284	669,284
Common Stock 44 | shares	11,500	11,500
Common Stock 45	5.00%	5.00%
Common Stock 46 | shares	3,000,000	3,000,000
Common Stock 47	550,338	550,338
Common Stock 48	326,613	326,613
Common Stock 49	239,112	239,112
Common Stock 50	311,226	311,226
Common Stock 51 | shares	210,476	210,476
Common Stock 52	$ 309,048
Common Stock 53	$ 369,365
Common Stock 54 | yr	2.2	2.2
Common Stock 55 | yr	1.47	1.47