Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss attributable to New Relic	$ (47,551)	$ (18,614)	$ (77,307)	$ (33,783)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of tax	(1,711)	(186)	(2,470)	1,310
Comprehensive loss	$ (49,262)	$ (18,800)	$ (79,777)	$ (32,473)