Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss attributable to New Relic	$ (250,402)	$ (192,610)	$ (88,937)
Other comprehensive loss:
Unrealized gain (loss) on available-for-sale securities, net of tax	(7,993)	(4,888)	4,224
Comprehensive loss attributable to New Relic	$ (258,395)	$ (197,498)	$ (84,713)