Grants (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended		55 Months Ended
	Sep. 15, 2015	May 31, 2020	Sep. 30, 2015	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contracts Revenue				$ 3,377	$ 3,982
Bill Melinda Gates Foundation [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contracts Revenue				300		$ 82,000
Grant Agreement			$ 89,100	89,100
Global Access Commitments Agreement GACA [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contract term after first sale	15 years
Contract term	10 years
Contract term additional years	5 years
Coalition for Epidemic Preparedness Innovations ("CEPI") [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Revenue				2,300
Grant Agreement				3,900
Initial Funding Development Costs				$ 3,900
Coalition for Epidemic Preparedness Innovations ("CEPI") [Member] | Subsequent Event [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Additional Funding Development Cost		$ 384,500