Commitments - Heroin In-License Vaccine (Details) - License Royalty Commitment - USD ($)	1 Months Ended	9 Months Ended
	Oct. 31, 2016	Sep. 30, 2018	Sep. 30, 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
Royalty expense		$ 5,000	$ 0
Maximum
Other Commitments [Line Items]
Fixed milestone payments	715,700
Minimum
Other Commitments [Line Items]
Payments for royalties	$ 10,000