License Agreements and Grants - National Institute of Health Grant (Details) - National Institute of Health Grant - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		41 Months Ended
	Feb. 28, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Research and Development Arrangement, Contract to Perform for Others, Proposed Period	5 years
Total grant funding	$ 5,000,000	$ 38,000	$ 0	$ 98,000	$ 3,000
Cumulative amount awarded						$ 1,100,000