Net Loss Per Share - Computation of Net Loss Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net loss attributable to New Relic	$ (62,706)	$ (53,626)	$ (194,889)	$ (130,933)
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	64,983	61,209	64,203	60,562
Weighted-average shares used to compute net loss per share, diluted (in shares)	64,983	61,209	64,203	60,562
Net loss attributable to New Relic per share, basic (in dollars per share)	$ (0.96)	$ (0.88)	$ (3.04)	$ (2.16)
Net loss attributable to New Relic per share, diluted (in dollars per share)	$ (0.96)	$ (0.88)	$ (3.04)	$ (2.16)