Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss attributable to New Relic	$ (8,336)	$ (14,691)	$ (13,951)	$ (30,625)
Other comprehensive loss:
Unrealized gain (loss) on available-for-sale securities, net of tax	(303)	19	(249)	2
Comprehensive loss	$ (8,639)	$ (14,672)	$ (14,200)	$ (30,623)