Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss attributable to New Relic	$ (27,195)	$ (10,103)	$ (60,978)	$ (24,054)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of tax	(48)	612	1,262	363
Comprehensive loss	$ (27,243)	$ (9,491)	$ (59,716)	$ (23,691)