Schedule Stock Options, Activity (Details) (USD $)	9 Months Ended
	Apr. 30, 2013
Capital Stock Schedule Stock Options, Activity 1	$ 9,559,271
Capital Stock Schedule Stock Options, Activity 2	1.95
Capital Stock Schedule Stock Options, Activity 3	6.52
Capital Stock Schedule Stock Options, Activity 4	(211,750)
Capital Stock Schedule Stock Options, Activity 5	0.37
Capital Stock Schedule Stock Options, Activity 6	3.99
Capital Stock Schedule Stock Options, Activity 7	9,347,521
Capital Stock Schedule Stock Options, Activity 8	1.99
Capital Stock Schedule Stock Options, Activity 9	6.33
Capital Stock Schedule Stock Options, Activity 10	130,000
Capital Stock Schedule Stock Options, Activity 11	2.41
Capital Stock Schedule Stock Options, Activity 12	10.00
Capital Stock Schedule Stock Options, Activity 13	(293,566)
Capital Stock Schedule Stock Options, Activity 14	0.37
Capital Stock Schedule Stock Options, Activity 15	3.23
Capital Stock Schedule Stock Options, Activity 16	(93,000)
Capital Stock Schedule Stock Options, Activity 17	2.80
Capital Stock Schedule Stock Options, Activity 18	8.27
Capital Stock Schedule Stock Options, Activity 19	(38,773)
Capital Stock Schedule Stock Options, Activity 20	3.59
Capital Stock Schedule Stock Options, Activity 21	0
Capital Stock Schedule Stock Options, Activity 22	9,052,182
Capital Stock Schedule Stock Options, Activity 23	2.03
Capital Stock Schedule Stock Options, Activity 24	6.23
Capital Stock Schedule Stock Options, Activity 25	(5,806)
Capital Stock Schedule Stock Options, Activity 26	0.33
Capital Stock Schedule Stock Options, Activity 27	2.67
Capital Stock Schedule Stock Options, Activity 28	(92,500)
Capital Stock Schedule Stock Options, Activity 29	2.78
Capital Stock Schedule Stock Options, Activity 30	7.58
Capital Stock Schedule Stock Options, Activity 31	$ 8,953,876
Capital Stock Schedule Stock Options, Activity 32	2.03
Capital Stock Schedule Stock Options, Activity 33	5.96