Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Income (Loss) Basic:
Income attributable to common stock	$ 10,649,790	$ 3,970,040	$ 10,049,162	$ (7,139,977)
Income (Loss) Diluted:
Income attributable to common stock, including assumed conversions	$ 10,649,790	$ 3,970,040	$ 10,049,162	$ (7,139,977)
Weighted Average Common Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	2,006,181	1,880,279	1,999,307	1,865,230
Weighted Average Number of Shares Outstanding, Diluted	2,169,966	2,605,270	2,210,990	1,865,230
Effective of Dilutive Securities:
Stock options and warrants	163,785	724,991	211,683	0
Per Share Basic:
Earnings Per Share, Basic	$ 5.31	$ 2.11	$ 5.03	$ (3.83)
Per Share Diluted:
Earnings Per Share, Diluted	$ 4.91	$ 1.52	$ 4.55	$ (3.83)