Geographical Information - Long-lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	$ 25,329	$ 29,428
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	18,321	4,393
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	7,008	25,035
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	3	5
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	1,845	2,681
Netherlands
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	5,160	5,541
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current Assets	$ 0	$ 16,808