Commitments - Section C (Details) - License Royalty Commitment - USD ($)	1 Months Ended	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2017	Jul. 31, 2017
Other Commitments [Line Items]
Percentage of royalty net sales	3.00%
Percentage of royalty sublicensed	4.00%
Payments for minimum annual royalty	$ 10,000
Payments for royalties		$ 60,000
Payments for royalties, execution fee		50,000
Royalty expense, monthly rate		833
Minimum
Other Commitments [Line Items]
Payments for royalties		$ 10,000
Maximum
Other Commitments [Line Items]
Fixed milestone payments			$ 715,700