Composition of Certain Financial Statement Captions - Summary of Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Accounts Receivable Net Current [Abstract]
Accounts receivable, gross	$ 83,555	$ 93,513
Allowance for doubtful accounts	(3,549)	(6,054)
Accounts receivable, net	$ 80,006	$ 87,459