Geographical Information - Long-lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	$ 20,896	$ 21,522
United States
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	20,845	21,433
Foreign
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	51	89
The Netherlands
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	43	42
Other
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	$ 8	$ 47