Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss attributable to New Relic	$ (18,614)	$ (8,336)	$ (33,783)	$ (13,951)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of tax	(186)	(303)	1,310	(249)
Comprehensive loss	$ (18,800)	$ (8,639)	$ (32,473)	$ (14,200)