Schedule Stock Options, Activity (Details) (USD $)	6 Months Ended
	Jan. 31, 2014
Capital Stock Schedule Stock Options, Activity 1	$ 8,966,189
Capital Stock Schedule Stock Options, Activity 2	2.02
Capital Stock Schedule Stock Options, Activity 3	5.72
Capital Stock Schedule Stock Options, Activity 4	(67,803)
Capital Stock Schedule Stock Options, Activity 5	0.33
Capital Stock Schedule Stock Options, Activity 6	1.19
Capital Stock Schedule Stock Options, Activity 7	(3,900)
Capital Stock Schedule Stock Options, Activity 8	10.26
Capital Stock Schedule Stock Options, Activity 9	0
Capital Stock Schedule Stock Options, Activity 10	(75,000)
Capital Stock Schedule Stock Options, Activity 11	3.12
Capital Stock Schedule Stock Options, Activity 12	2.17
Capital Stock Schedule Stock Options, Activity 13	8,819,486
Capital Stock Schedule Stock Options, Activity 14	2.02
Capital Stock Schedule Stock Options, Activity 15	5.53
Capital Stock Schedule Stock Options, Activity 16	(30,850)
Capital Stock Schedule Stock Options, Activity 17	4.11
Capital Stock Schedule Stock Options, Activity 18	0
Capital Stock Schedule Stock Options, Activity 19	$ 8,788,636
Capital Stock Schedule Stock Options, Activity 20	2.01
Capital Stock Schedule Stock Options, Activity 21	5.32