Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Incentive and Tax Receivable
Prepaid preclinical trial expenses	$ 1,473,402	$ 1,473,402	$ 1,211,668
Loss on disposal of equipment	99,147	99,147
Impairment of long-lived assets		$ 0	$ 0	$ 0
Research services revenue				$ 100,000
Computer equipment
Incentive and Tax Receivable
Estimated useful life (in years)		P3Y
Equipment
Incentive and Tax Receivable
Estimated useful life (in years)		P5Y
Furniture and fixtures
Incentive and Tax Receivable
Estimated useful life (in years)		P5Y
Australian Taxation Office
Incentive and Tax Receivable
Cash refund from research and development incentive program		$ 400,000
Cash refund from GST paid		500,000
Incentive And Tax Receivables | Australian Taxation Office
Incentive and Tax Receivable
Estimated incentive receivable	3,300,000	3,300,000
Estimated GST receivable	$ 300,000	$ 300,000