Commitments - Heroin In-License Vaccine (Details) - License Royalty Commitment - USD ($)	1 Months Ended	3 Months Ended
	Oct. 31, 2016	Mar. 31, 2018	Mar. 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
Royalty Expense		$ 3,000	$ 0
Minimum
Other Commitments [Line Items]
Payments for royalties	10,000
Maximum
Other Commitments [Line Items]
Fixed milestone payments	$ 715,700