Stockholder's Equity - Schedule of Warrants Outstanding (Details) - Warrant - USD ($)	5 Months Ended	12 Months Ended
	Dec. 31, 2017	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Number of Shares
Outstanding at beginning of period (in shares)	768,800	1,215,385	1,338,552
Expired (in shares)		(166,585)	(123,167)
Granted (in shares)		45,000
Forfeited (in shares)	(55,000)	(325,000)
Exercised (in dollars per share)	(356,790)
Outstanding at end of period (in shares)	357,010	768,800	1,215,385	1,338,552
Weighted- average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 12.50	$ 17.90	$ 19.53
Expired (in dollars per share)		46.37	35.55
Granted (in dollars per share)		10.00
Forfeited (in dollars per share)	15.00	15.00
Outstanding at end of period (in dollars per share)	9.78	$ 12.50	$ 17.90	$ 19.53
Exercisable (in dollars per share)	$ 14.83
Weighted- average Remaining Contractual Term (years)
Outstanding	5 years 6 months 26 days	3 years 15 days	2 years 10 months 10 days	3 years 6 months 18 days
Aggregate Intrinsic Value
Outstanding	$ 4,708,020	$ 1,184,000	$ 0