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		29 Months Ended
	Feb. 28, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Length of project	5 years
Total grant funding	$ 5,000,000	$ 0	$ 50,000	$ 3,000	$ 59,000	$ 560,000
Research and Development Arrangement, Contract to Perform for Others, Invoiced						$ 818,000