Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Accumulated Other Comprehensive Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Mar. 31, 2020			60,098			260
Beginning balance at Mar. 31, 2020	$ 390,639		$ 60	$ 780,479		$ (263)	$ 4,869	$ (394,506)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			332
Issuance of common stock upon exercise of stock options	3,632			3,632
Issuance of common stock for vested restricted stock units (in shares)			1,123
Issuance of common stock for vested restricted stock units	0		$ 1	(1)
Issuance of common stock related to employee stock purchase plan (in shares)			137
Issuance of common stock related to employee stock purchase plan	6,494			6,494
Issuance of common stock related to acquisition of business (in shares)			1,621
Issuance of common stock related to acquisition of business	62,367		$ 2	62,365
Stock-based compensation expense	103,701			103,701
Other comprehensive loss, net	(3,937)						(3,937)
Net loss attributable to New Relic	(130,933)							(130,933)
Ending balance (in shares) at Dec. 31, 2020			63,311			260
Ending balance at Dec. 31, 2020	431,963		$ 63	956,670		$ (263)	932	(525,439)
Beginning balance (in shares) at Mar. 31, 2020			60,098			260
Beginning balance at Mar. 31, 2020	$ 390,639		$ 60	780,479		$ (263)	4,869	(394,506)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06
Ending balance (in shares) at Mar. 31, 2021			64,019			260
Ending balance at Mar. 31, 2021	$ 413,975	$ (45,926)	$ 64	1,001,309	$ (100,136)	$ (263)	(19)	(587,116)	$ 54,210
Beginning balance (in shares) at Sep. 30, 2020			61,227			260
Beginning balance at Sep. 30, 2020	387,395		$ 61	857,011		$ (263)	2,399	(471,813)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			45
Issuance of common stock upon exercise of stock options	982			982
Issuance of common stock for vested restricted stock units (in shares)			418
Issuance of common stock related to acquisition of business (in shares)			1,621
Issuance of common stock related to acquisition of business	62,367		$ 2	62,365
Stock-based compensation expense	36,312			36,312
Other comprehensive loss, net	(1,467)						(1,467)
Net loss attributable to New Relic	(53,626)							(53,626)
Ending balance (in shares) at Dec. 31, 2020			63,311			260
Ending balance at Dec. 31, 2020	431,963		$ 63	956,670		$ (263)	932	(525,439)
Beginning balance (in shares) at Mar. 31, 2021			64,019			260
Beginning balance at Mar. 31, 2021	$ 413,975	$ (45,926)	$ 64	1,001,309	$ (100,136)	$ (263)	(19)	(587,116)	$ 54,210
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	727		727
Issuance of common stock upon exercise of stock options	$ 29,165		$ 1	29,164
Issuance of common stock for vested restricted stock units (in shares)			1,149
Issuance of common stock for vested restricted stock units	0		$ 1	(1)
Issuance of common stock related to employee stock purchase plan (in shares)			100
Issuance of common stock related to employee stock purchase plan	5,417			5,417
Issuance of common stock related to acquisition of business (in shares)			401
Issuance of common stock related to acquisition of business	13,487			13,487
Stock-based compensation expense	119,057			119,057
Other comprehensive loss, net	(2,938)						(2,938)
Net loss attributable to New Relic	(194,889)							(194,889)
Ending balance (in shares) at Dec. 31, 2021			66,396			260
Ending balance at Dec. 31, 2021	337,348		$ 66	1,068,297		$ (263)	(2,957)	(727,795)
Beginning balance (in shares) at Sep. 30, 2021			65,639			260
Beginning balance at Sep. 30, 2021	341,868		$ 65	1,008,363		$ (263)	(1,208)	(665,089)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			412
Issuance of common stock upon exercise of stock options	21,551		$ 1	21,550
Issuance of common stock for vested restricted stock units (in shares)			345
Stock-based compensation expense	38,384			38,384
Other comprehensive loss, net	(1,749)						(1,749)
Net loss attributable to New Relic	(62,706)							(62,706)
Ending balance (in shares) at Dec. 31, 2021			66,396			260
Ending balance at Dec. 31, 2021	$ 337,348		$ 66	$ 1,068,297		$ (263)	$ (2,957)	$ (727,795)