Fair Value Measurements - Financial Assets and Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) (Details ) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Company's assets measured at fair value using significant unobservable inputs (Level 3)
Balance	$ 1,900	$ 1,000
Acquisition		1,850
Fair value adjustments	(1,367)	(950)	$ 1,000
Balance		$ 1,900	$ 1,000
Topaz Information Systems, LLC | Level 2
Company's assets measured at fair value using significant unobservable inputs (Level 3)
Fair value adjustments	(1,367)
Transfer of Topaz contingent consideration to Level 2	$ (533)