Geographical Information - Long-lived Assets By Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	$ 10,594	$ 10,650
United States
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	8,994	8,632
Foreign
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	1,600	2,018
Macau
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	1,489	1,896
Other
Revenues from External Customers and Long-Lived Assets
Total tangible long-lived assets, net	$ 111	$ 122