Commitments - Torreya Agreement (Details)			3 Months Ended
	Sep. 08, 2017 USD ($) trading_days installment	Apr. 25, 2016	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 18, 2014
2014 Consulting Agreement
Other Commitments [Line Items]
Additional consultant fee payable, percentage of perpetuity in excess of $3 million					3.75%
2016 Consulting Agreement
Other Commitments [Line Items]
Percentage of gross funding up to $20 million		5.00%
Percentage of gross funding over $20 million		3.50%
Advisory Services
Other Commitments [Line Items]
Other commitment	$ 300,000
Number of installment payments | installment	3
Installment payment period	16 months
Stock issued during period for services	$ 300,000
Milestone payment	$ 140,600
Milestone payment percentage	3.75%
Milestone payment period	15 days
Milestone payment percentage of total consideration with payment	3.375%
Milestone payment percentage of total consideration with payment and additional provision	3.5625%
Milestone period	6 years
Milestone payment percentage of total consideration without payment	3.45525%
Milestone payment percentage of total consideration without payment and with additional provision	3.60263%
Threshold trading days | trading_days	10
Sponsor fees			$ 65,686.000	$ 0
Accrued liabilities			$ 66,000