Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Summary of Stock Option Activity (Details)

v3.8.0.1
Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($)
12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Option Shares Outstanding Balance, Beginning 3,263,460 1,148,764
Option Shares Outstanding, Granted 3,028,536 2,729,250 [1]
Option Shares Outstanding. Exercised (7,500) [1]
Option Shares Outstanding, Forfeited / Cancelled / Expired (2,648,855) (614,554)
Option Shares Outstanding Balance, Ending 3,635,641 3,263,460
Option Shares Outstanding Balance, Exercisable 1,990,521
Weighted-Average Exercise Price, Beginning $ 5.88 $ 9.20
Weighted-Average Exercise Price, Granted 1.41 4.84
Weighted-Average Exercise Price, Exercised 1.29
Weighted-Average Exercise Price, Forfeited / Cancelled / Expired 6.21 7.49
Weighted-Average Exercise Price, Ending 1.94 5.88
Weighted-Average Exercise Price, Exercisable $ 2.29
Average Remaining Contractual Term (Years), End 7 years 110 months 23 days 8 years 11 days
Average Remaining Contractual Term (Years), Exercisable 7 years 32 months 9 days 0 years
Aggregate Intrinsic Value, Beginning $ 9,000 $ 216,000
Aggregate Intrinsic Value, Granted
Aggregate Intrinsic Value, Exercised $ 2,000
Aggregate Intrinsic Value, Forfeited / Cancelled / Expired $ 33,000
Aggregate Intrinsic Value, Ending $ 9,000
Aggregate Intrinsic Value, Exercisable
[1] Recast to reflect the 1-for-20 reverse stock split effected May 2015