Grant Agreement (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended		46 Months Ended
	Sep. 15, 2015	Sep. 30, 2015	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contracts Revenue			$ 3,357	$ 10,773	$ 7,339	$ 20,426
Bill Melinda Gates Foundation [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contracts Revenue			$ 2,400		5,600		$ 79,000
Grant Agreement		$ 89,100			$ 89,100
GACA, Term of Contract From the Effective Date	15 years
GACA, Term of Contract After the First Sale	10 years
GACA, Extension of Maximum Term of Contract	5 years