New Relic (NEWR) 10-K 14 May 21 2021 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Mar. 31, 2021	May 07, 2021	Sep. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-36766
Entity Registrant Name	New Relic, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-2017431
Entity Address, Address Line One	188 Spear Street
Entity Address, Address Line Two	Suite 1000
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94105
City Area Code	650
Local Phone Number	777-7600
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	NEWR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		63,794,212
Entity Central Index Key	0001448056
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 3

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 240,821	$ 292,523
Short-term investments	575,254	512,574
Accounts receivable, net of allowances of $2,633 and $3,636, respectively	174,027	147,361
Prepaid expenses and other current assets	21,944	15,979
Deferred contract acquisition costs	36,210	32,016
Total current assets	1,048,256	1,000,453
Property and equipment, net	91,308	100,294
Restricted cash	5,642	5,641
Goodwill	144,253	45,112
Intangible assets, net	12,986	13,691
Deferred contract acquisition costs, non-current	32,579	28,141
Lease right-of-use-assets	57,425	57,777
Other assets, non-current	6,170	7,325
Total assets	1,398,619	1,258,434
Current liabilities:
Accounts payable	24,171	12,565
Accrued compensation and benefits	37,196	29,054
Other current liabilities	19,174	13,120
Deferred revenue	373,594	313,161
Lease liabilities	7,886	8,682
Total current liabilities	462,021	376,582
Convertible senior notes, net	449,380	427,044
Lease liabilities, non-current	59,924	57,394
Deferred revenue, non-current	1,674	3,166
Other liabilities, non-current	8,256	1,940
Total liabilities	981,255	866,126
Redeemable non-controlling interest	3,389	1,669
Stockholders’ equity:
Common stock, $0.001 par value; 100,000 shares authorized at March 31, 2021 and March 31, 2020; 64,019 shares and 60,098 shares issued at March 31, 2021 and March 31, 2020; and 63,759 shares and 59,838 shares outstanding at March 31, 2021 and March 31, 2020	64	60
Treasury stock—at cost (260 shares)	(263)	(263)
Additional paid-in capital	1,001,309	780,479
Accumulated other comprehensive income (loss)	(19)	4,869
Accumulated deficit	(587,116)	(394,506)
Total stockholders’ equity	413,975	390,639
Total liabilities, redeemable non-controlling interest and stockholders’ equity	$ 1,398,619	$ 1,258,434

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,633	$ 3,636
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	64,019,000	60,098,000
Common stock, shares outstanding (in shares)	63,759,000	59,838,000
Treasury stock (in shares)	260,000	260,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 667,648	$ 599,510	$ 479,225
Cost of revenue	181,564	103,237	77,399
Gross profit	486,084	496,273	401,826
Operating expenses:
Research and development	174,851	148,159	104,859
Sales and marketing	361,702	334,319	257,066
General and administrative	120,931	99,284	73,007
Total operating expenses	657,484	581,762	434,932
Loss from operations	(171,400)	(85,489)	(33,106)
Other income (expense):
Interest income	7,888	15,482	13,103
Interest expense	(24,901)	(23,695)	(19,679)
Other income (expense), net	(1,918)	2,934	(1,377)
Loss before income taxes	(190,331)	(90,768)	(41,059)
Income tax provision	559	211	697
Net loss	(190,890)	(90,979)	(41,756)
Net loss and adjustment attributable to redeemable non-controlling interest	(1,720)	2,042	863
Net loss attributable to New Relic	$ (192,610)	$ (88,937)	$ (40,893)
Net loss attributable to New Relic per share, basic and diluted (in usd per share)	$ (3.15)	$ (1.52)	$ (0.72)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	61,070	58,601	56,884

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss attributable to New Relic	$ (192,610)	$ (88,937)	$ (40,893)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of tax	(4,888)	4,224	969
Comprehensive loss	$ (197,498)	$ (84,713)	$ (39,924)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated DeficitCumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Mar. 31, 2018			56,213		260
Beginning balance at Mar. 31, 2018	$ 215,104	$ 40,808	$ 56	$ 521,119	$ (263)	$ (324)	$ (305,484)	$ 40,808
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			822
Issuance of common stock upon exercise of stock options	17,384		$ 1	17,383
Issuance of common stock for vested restricted stock units (in shares)			879
Issuance of common stock for vested restricted stock units	1		$ 1	0
Issuance of common stock related to employee stock purchase plan (in shares)			155
Issuance of common stock related to employee stock purchase plan	11,165			11,165
Issuance of common stock related to acquisition of business (in shares)			297
Issuance of common stock related to acquisition of business	11,896			11,896
Stock-based compensation expense	56,242			56,242
Other comprehensive income (loss), net	969					969
Net loss attributable to New Relic	(40,893)						(40,893)
Equity component of convertible senior notes, net of issuance costs	100,136			100,136
Purchase of capped calls	(63,182)			(63,182)
Ending balance (in shares) at Mar. 31, 2019			58,366		260
Ending balance at Mar. 31, 2019	349,630		$ 58	654,759	$ (263)	645	(305,569)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			502
Issuance of common stock upon exercise of stock options	11,632		$ 1	11,631
Issuance of common stock for vested restricted stock units (in shares)			960
Issuance of common stock for vested restricted stock units	0		$ 1	(1)
Issuance of common stock related to employee stock purchase plan (in shares)			270
Issuance of common stock related to employee stock purchase plan	13,603			13,603
Stock-based compensation expense	100,487			100,487
Other comprehensive income (loss), net	4,224					4,224
Net loss attributable to New Relic	(88,937)						(88,937)
Ending balance (in shares) at Mar. 31, 2020			60,098		260
Ending 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)	462		462
Issuance of common stock upon exercise of stock options	$ 6,865		$ 0	6,865
Issuance of common stock for vested restricted stock units (in shares)			1,536
Issuance of common stock for vested restricted stock units	0		$ 2	(2)
Issuance of common stock related to employee stock purchase plan (in shares)			302
Issuance of common stock related to employee stock purchase plan	14,425			14,425
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	137,177			137,177
Other comprehensive income (loss), net	(4,888)					(4,888)
Net loss attributable to New Relic	(192,610)			0			(192,610)
Ending balance (in shares) at Mar. 31, 2021			64,019		260
Ending balance at Mar. 31, 2021	$ 413,975		$ 64	$ 1,001,309	$ (263)	$ (19)	$ (587,116)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss attributable to New Relic	$ (192,610)	$ (88,937)	$ (40,893)
Net loss and adjustment attributable to redeemable non-controlling interest (Note 3)	1,720	(2,042)	(863)
Net loss:	(190,890)	(90,979)	(41,756)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	89,312	75,743	53,794
Stock-based compensation expense	135,143	99,536	56,198
Amortization of debt discount and issuance costs	22,336	21,107	17,404
Gain on lease modification	0	(3,006)	0
Other	3,610	(1,399)	(1,655)
Changes in operating assets and liabilities, net of acquisition of businesses:
Accounts receivable, net	(27,084)	(28,425)	(22,557)
Prepaid expenses and other assets	(7,571)	760	(1,814)
Deferred contract acquisition costs	(46,953)	(39,505)	(38,667)
Lease right-of-use assets	959	21,751	0
Accounts payable	11,766	7,436	245
Accrued compensation and benefits and other liabilities	18,778	5,044	11,539
Lease liabilities	1,519	(19,374)	0
Deferred revenue	58,941	44,730	81,559
Deferred rent	0	0	1,227
Net cash provided by operating activities	69,866	93,419	115,517
Cash flows from investing activities:
Purchases of property and equipment	(18,737)	(58,218)	(43,303)
Cash paid for acquisitions, net of cash acquired	(41,536)	(4,250)	(30,432)
Purchases of short-term investments	(405,054)	(391,079)	(659,428)
Proceeds from sale and maturity of short-term investments	335,964	395,559	267,657
Capitalized software development costs	(13,494)	(6,641)	(5,162)
Net cash used in investing activities	(142,857)	(64,629)	(470,668)
Cash flows from financing activities:
Investment from redeemable non-controlling interest	0	978	3,596
Proceeds from issuance of convertible senior notes, net of issuance costs paid of $11,582	0	0	488,669
Purchase of capped call related to convertible senior notes	0	0	(63,182)
Proceeds from employee stock purchase plan	14,425	13,603	11,165
Proceeds from exercise of employee stock options	6,865	11,632	17,383
Net cash provided by financing activities	21,290	26,213	457,631
Net increase (decrease) in cash, cash equivalents and restricted cash	(51,701)	55,003	102,480
Cash, cash equivalents and restricted cash at beginning of period	298,164	243,161	140,681
Cash, cash equivalents and restricted cash at end of period	246,463	298,164	243,161
Reconciliation of cash, cash equivalents and restricted cash to condensed consolidated balance sheets:
Total cash, cash equivalents and restricted cash	246,463	243,161	140,681
Supplemental disclosure of cash flow information:
Cash paid for interest and income taxes	4,544	4,184	2,062
Noncash investing and financing activities:
Issuance of common stock for the acquisition of business	62,365	0	11,896
Property and equipment purchased but not paid yet	1,776	2,196	7,855
Acquisition holdback	$ 0	$ 850	$ 865

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) $ in Thousands	12 Months Ended
	Mar. 31, 2019USD ($)
Statement of Cash Flows [Abstract]
Payment of issuance costs	$ 11,582

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Description of Business and Summary of Significant Accounting Policies	Description of Business and Summary of Significant Accounting Policies New Relic, Inc. (the “Company” or “New Relic”) was incorporated in Delaware on February 20, 2008, when it converted from a Delaware limited liability company called New Relic Software, LLC, which was formed in Delaware in September 2007. The Company delivers the observability platform for engineers to plan, build, deploy and operate more perfect software. New Relic One is the Company’s purpose-built offering for customers to land all of their telemetry data quickly and affordably in one place, and to translate that data into actionable insights. Basis of Presentation and Consolidation —The consolidated financial statements include the accounts of New Relic and its subsidiaries. These consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles, or GAAP. All intercompany balances and transactions have been eliminated in consolidation. Foreign Currency Translation and Transactions —The functional currency of the Company’s foreign subsidiaries is the U.S. dollar. The Company translates all monetary assets and liabilities denominated in foreign currencies into U.S. dollars using the exchange rates in effect at the balance sheet dates and other assets and liabilities using historical exchange rates. Foreign currency-denominated revenue and expenses have been re-measured using the average exchange rates in effect during each period. Foreign currency re-measurement gains and losses have been included in other income (expense). Use of Estimates —The preparation of the Company’s consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of income and expenses during the reporting period. Significant items subject to such estimates and assumptions include the fair value of share-based awards, fair value of purchased intangible assets and goodwill, fair value of debt and equity components related to the 0.5% convertible senior notes due 2023 (the “Notes”), useful lives of purchased intangible assets, unrecognized tax benefits, expected benefit period for deferred commissions, incremental borrowing rate used for operating lease liabilities, and the capitalization and estimated useful life of the Company’s software development costs. These estimates are based on information available as of the date of the consolidated financial statements; therefore, actual results could differ from management’s estimates. COVID-19 —The COVID-19 pandemic has resulted in a global slowdown of economic activity that is expected to continue and which is likely to decrease demand for a broad variety of goods and services, while also disrupting sales channels and marketing activities for an unknown period of time until the disease is contained. The Company’s revenue and deferred revenue have been negatively impacted by the slowdown in activity associated with the COVID-19 pandemic for the fiscal year ending March 31, 2021, but at this point, the extent of any continuing impact to the Company’s financial condition or results of operations is uncertain, particularly as the COVID-19 pandemic continues to persist for an extended period of time, and as of the date of issuance of these financial statements, management is not aware of any specific event or circumstance that would require an update to estimates and judgments or revising the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained, and will be recognized in the condensed consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the financial statements. Segments —The Company’s chief operating decision maker is the Chief Executive Officer, who reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region. Accordingly, the Company has determined that it has a single reportable segment. Cash and Cash Equivalents —The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash and cash equivalents. Restricted Cash —The Company has an agreement to maintain cash balances at a financial institution as collateral for letters of credit relating to the Company’s property leases. Short-term Investments —Short-term investments consist of money market funds, certificates of deposit, commercial paper, U.S. treasury securities, U.S. agency securities, and corporate debt securities, and are classified as available-for-sale securities. The Company has classified its investments as current based on the nature of the investments and their availability for use in current operations. Available-for-sale securities are carried at fair value with unrealized gains and losses reported as a component of accumulated other comprehensive income, while realized gains and losses are reported within the statement of operations. The Company reviews its debt securities classified as short-term investments on a regular basis to evaluate whether or not any security has experienced an other-than-temporary decline in fair value. The Company considers factors such as the length of time and extent to which the market value has been less than the cost, the financial position and near-term prospects of the issuer, and the Company’s intent to sell, or whether it is more likely than not the Company will be required to sell the investment before recovery of the investment’s amortized-cost basis. If the Company determines that an other-than-temporary decline exists in one of these securities, the respective investment would be written down to fair value. For debt securities, the portion of the write-down related to credit loss would be recognized to other income, net in the consolidated statement of operations. Any portion not related to credit loss would be included in accumulated other comprehensive income (loss). The Company did not identify any investments as other-than-temporarily impaired as of March 31, 2021 or March 31, 2020. Business Combinations —The Company recognizes identifiable assets acquired and liabilities assumed at their acquisition date fair value. Goodwill as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date fair values of the assets acquired and the liabilities assumed. While the Company uses its best estimates and assumptions as a part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the acquisition date, its estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed, with the corresponding offset to goodwill to the extent that the Company identifies adjustments to the preliminary purchase price allocation. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company’s consolidated statements of operations. There has been no such adjustment as of March 31, 2021. Property and Equipment —Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. The Company uses an estimated useful life of three years for employee-related computers and software, three years for other office equipment and site-related computer hardware, and five years for furniture. Leasehold improvements are amortized over the shorter of the lease-term or the estimated useful life of the related asset. Down payments for property and equipment are recorded at cost and included in other assets in the accompanying consolidated balance sheet. Once the corresponding property and equipment item has been received, it will be reclassified to property and equipment and depreciated. Revenue Recognition —The Company generates revenue from subscription-based arrangements and usage-based arrangements that allow customers to access its products and/or platform. The Company determines revenue recognition through the following steps: • identification of the contract, or contracts with a customer; • identification of the performance obligations in the contract; • determination of the transaction price; • allocation of the transaction price to the performance obligations in the contract; and • recognition of revenue, when, or as, the Company satisfies a performance obligation. Revenue from subscription-based arrangements is recognized on a ratable basis over the contractual subscription period of the arrangement beginning when or as control of the promised goods or services is transferred to the customer. Beginning in the second quarter of fiscal 2021, the Company started offering usage-based pricing to its customers. Customers have the option to be charged upon their incurred usage in arrears (“Pay as You Go”), or they may commit to a minimum spend over their contracted period (“Annual Pool of Funds”). Revenue related to Pay as You Go contracts are recognized based on the customers’ actual usage. Revenue related to Annual Pool of Funds contracts are recognized on a ratable basis over the contract period including an estimate of the usage above the minimum commitment. The estimated usage-based revenues are constrained to the amount the Company expects to be entitled to receive in exchange for providing access to its platform. Deferred Revenue —Deferred revenue consists of billings or payments received in advance of revenue being recognized. The Company generally invoices its customers monthly, quarterly, or annually. Deferred revenue that will be recognized during the succeeding 12-month period is recorded as current deferred revenue and the remaining portion is recorded as non-current deferred revenue. Cost of Revenue —Cost of revenue consists of expenses relating to data center operations, hosting-related costs, payment processing fees, depreciation and amortization, consulting costs, and salaries and benefits of operations and global customer support personnel. Accounts Receivable and Allowance for Doubtful Accounts —Accounts receivable are recorded at the invoiced amount, net of allowances for doubtful accounts. The allowance for doubtful accounts is based on the Company’s assessment of the collectability of accounts. The Company regularly reviews the adequacy of the allowance for doubtful accounts by considering the age of each outstanding invoice and the collection history of each customer to determine whether a specific allowance is appropriate. Accounts receivable deemed uncollectable are charged against the allowance for doubtful accounts when identified. For all periods presented, the allowance for doubtful accounts activity was not significant. Software Development Costs —The Company capitalizes certain development costs incurred in connection with its internal use software and website. These capitalized costs are primarily related to its software tools that are hosted by the Company and accessed by its customers on a subscription basis. Costs incurred in the preliminary stages of development are expensed as incurred. Once an application has reached the development stage, internal and external costs, if direct and incremental, are capitalized until the software is substantially complete and ready for its intended use. Capitalization ceases when the software is released or made available. The Company also capitalizes costs related to specific upgrades and enhancements when it is probable the expenditures will result in additional features and functionality. Maintenance costs are expensed as incurred. Internal use software is amortized on a straight-line basis over its estimated useful life, generally three years. The Company capitalized $17.6 million, $8.1 million, and $6.0 million in internal use software during the fiscal years ended March 31, 2021, 2020, and 2019, respectively. Included in the capitalized development costs were $4.1 million, $1.5 million, and $0.8 million of stock-based compensation costs for the fiscal years ended March 31, 2021, 2020, and 2019, respectively. Amortization expense totaled $7.0 million, $4.9 million, and $4.1 million during the fiscal years ended March 31, 2021, 2020, and 2019, respectively. The net book value of capitalized internal use software as of March 31, 2021 and 2020, which is recorded in property and equipment on the accompanying consolidated balance sheets, was $23.2 million and $13.5 million, respectively. The Company also capitalizes qualifying implementation costs incurred in a hosting arrangement that is a service contract based on the existing guidance for internally developed software. In accordance with the guidance, (i) capitalized implementation costs are classified in the same balance sheet line item as the amounts prepaid for the related hosting arrangement; (ii) amortization of capitalized implementation costs are presented in the same income statement line item as the service fees for the related hosting arrangement; and (iii) cash flows related to capitalized implementation costs are presented within the same category of cash flow activity as the cash flows for the related hosting arrangement (i.e. operating activity). The Company tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. The Company amortizes capitalized implementation costs over the expected life of the service contract. The Company capitalized $2.1 million and $2.5 million in implementation costs for software hosting arrangements during the fiscal years ended March 31, 2021 and 2020, respectively. Amortization expense totaled $1.2 million and $0.2 million during the fiscal years ended March 31, 2021 and 2020, respectively. Commissions —The Company capitalizes incremental commissions related to initial contracts and amortizes such costs over the expected period of benefit, which the Company has determined to be three years, because the commissions paid upon renewal are not commensurate with the commissions paid on initial contracts. The Company determined the period of benefit by taking into consideration the length of its customer contracts, their technology lifecycle, and other factors. Amortization expense is recorded in sales and marketing expense within the consolidated statement of operations. The Company expenses incremental commissions related to renewal contracts, as the commission paid on renewals are generally for contract periods of one year or less . Advertising Expenses —Advertising is expensed as incurred and is included in sales and marketing in the consolidated statements of operations. Advertising expense was $24.5 million, $21.8 million, and $19.3 million for the fiscal years ended March 31, 2021, 2020, and 2019, respectively. Operating Leases —The Company leases office space under non-cancelable operating leases which expire from 2021 to 2031. All of its office leases are classified as operating leases with lease expense recognized on a straight-line basis over the lease term. Lease right-of-use assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As these leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company considers information including, but not limited to, the lease term, the Company's credit rating and interest rates of similar debt instruments with comparable credit ratings. The lease right-of-use assets are also increased by any lease prepayments made and reduced by any lease incentives such as tenant improvement allowances. Options to extend the lease term are included in the lease term when it is reasonably certain that the Company will exercise the extension option. The Company’s operating leases typically include nonlease components such as common-area maintenance costs. The Company has elected to include nonlease components with lease payments for the purpose of calculating lease right-of-use assets and liabilities, to the extent that they are fixed. Nonlease components that are not fixed are expensed as incurred as variable lease payments. Leases with a term of one year or less are not recognized on the Company’s consolidated balance sheet. Impairment of Long-Lived Assets —Long-lived assets, such as property and equipment, acquired intangible assets, and capitalized software development costs subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. If circumstances require a long-lived asset be tested for possible impairment, the Company first compares undiscounted cash flows expected to be generated by the asset to its carrying value. If the carrying value of the long-lived asset is not recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent that the carrying value exceeds its fair value. Fair value is determined through various valuation techniques, including discounted cash flow models, quoted market values, and third-party independent appraisals, as considered necessary. For the fiscal years presented, the Company had not impaired any of its long-lived assets. Goodwill —Goodwill represents the excess of the purchase price of an acquired business over the fair value of the underlying net tangible and intangible assets. Goodwill is evaluated for impairment annually in the third quarter of the Company’s fiscal year, and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. Triggering events that may indicate impairment include, but are not limited to, a significant adverse change in customer demand or business climate that could affect the value of goodwill or a significant decrease in expected cash flows. Since inception through March 31, 2021, the Company did not have any goodwill impairment. Intangible Assets —Intangible assets consist of identifiable intangible assets, primarily developed technology, resulting from the Company’s acquisitions. Acquired intangible assets are recorded at cost, net of accumulated amortization. Intangible assets are amortized on a straight-line basis over their estimated useful lives. Stock-Based Compensation —The Company estimates the fair value of share-based awards on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods in the statements of operations. The Company recognizes compensation expense for the majority of its awards over the vesting period of the entire award using the straight-line attribution method. These amounts are reduced by an estimated forfeiture rate. The forfeiture rate is estimated based on actual cancellation experience and is applied to all share-based awards. The rate is estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company selected the Black-Scholes option-pricing model as the method for determining the estimated fair value for stock options and shares pursuant to the Company’s 2014 Employee Stock Purchase Plan, or ESPP. The Black-Scholes option-pricing model requires the use of highly subjective and complex assumptions, which determine the fair value of share-based awards, including the option’s expected term and the price volatility of the underlying stock. The Company uses a Monte Carlo simulation model to determine the fair value of its performance stock units, or PSUs, and recognizes expense using the accelerated attribution method over the requisite service period. The authoritative guidance prohibits the recognition of a deferred tax asset for an excess tax benefit that has not yet been included in the Company’s tax return. As a result, the Company will only recognize an excess tax benefit from stock-based compensation in additional paid-in capital in the period in which it is included in the Company’s tax return. Fair Value Measurements —The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities that are required to be recorded at fair value, the Company considers the principal or most advantageous market in which to transact and the market-based risk. The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The carrying amounts reported in the consolidated financial statements approximate the fair value for cash and cash equivalents, restricted cash, accounts receivable, accounts payable, and accrued liabilities, due to their short-term nature. Concentration of Risk —Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, short-term investments, and trade accounts receivable. The Company invests its excess cash in money market funds, certificates of deposit, commercial paper, U.S. treasury securities, U.S. agency securities, and corporate debt securities with major financial institutions. Management believes that the financial institutions that hold the Company’s investments are financially sound and, accordingly, are subject to minimal credit risk. There were no customers that represented more than 10% of the Company’s accounts receivable balance as of March 31, 2021 and March 31, 2020. In addition, there were no customers that individually exceeded 10% of the Company’s revenue during the fiscal years ended March 31, 2021, 2020, and 2019. Income Taxes —The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. In addition, deferred tax assets are recorded for the future benefit of utilizing net operating losses and research and development credit carryforwards. Valuation allowances are provided when necessary to reduce deferred tax assets to the amount that is more likely than not to be realized. The Company recognizes interest and penalties related to unrecognized tax benefits within the income tax expense line in the consolidated statement of operations Net Loss Per Share —The Company’s basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding for the period. The diluted net loss per share is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, options to purchase common stock, common stock reserved for issuance, restricted stock units, convertible debt, and shares issuable pursuant to the ESPP are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share as their effect is antidilutive. Recently Issued Accounting Pronouncements Not Yet Adopted In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40) . This ASU simplifies the accounting for convertible instruments by reducing the number of accounting models for convertible debt instruments and convertible preferred stock. This will result in more convertible debt instruments being accounted for as a single liability instrument and more convertible preferred stock being accounted for as a single equity instrument with no separate accounting for embedded conversion features. The ASU also simplifies the diluted earnings per share (“EPS”) calculation in certain areas. This standard will be effective for the Company in the fiscal year beginning April 1, 2022. The Company is currently evaluating the effect the standard will have on its consolidated financial statements. Recently Adopted Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which amends guidance on reporting credit losses for assets held at amortized cost basis and available-for-sale debt securities. The Company adopted this new standard on April 1, 2020. The adoption of this standard did not have a material impact on its consolidated financial statements. Under the new standard, the Company assesses credit losses on accounts receivable by taking into consideration past collection experience, credit quality of the customer, age of the receivable balance, current economic conditions, and forecasts that affect the collectability of the reported amount. With respect to available-for-sale debt securities, the updated guidance requires that credit losses be presented as an allowance rather than as a write-down. Allowance for credit losses is recorded in other income (expense), net on the consolidated statements of operations, limited by the amount that fair value is less than the amortized cost basis. Non-credit related impairment losses are reported as a separate component on the consolidated statements of comprehensive loss. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment , which eliminates Step 2 from the goodwill impairment test. The Company adopted this standard on April 1, 2020. The adoption of this standard did not have a material impact on its consolidated financial statements or disclosures. In August 2018, the FASB issued ASU 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which amends ASC 820, Fair Value Measurement. ASU 2018-13 modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. The removed and modified disclosures will be adopted on a retrospective basis and the new disclosures will be adopted on a prospective basis. The Company adopted this standard on April 1, 2020. The adoption of this standard did not have a material impact on its consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740)

Business Combination

Business Combination	12 Months Ended
	Mar. 31, 2021
Business Combinations [Abstract]
Business Combination	Business Combination Pixie Labs Inc. On December 22, 2020, the Company acquired all of the equity interests in Pixie Labs Inc. (“Pixie Labs”), a company that provides a next-generation machine intelligence observability solution for developers using Kubernetes. The aggregate purchase price of $107.9 million consisted of approximately $45.6 million in cash (of which $15.0 million is being held in escrow for 12 months after the transaction closing date) and 884,269 shares of Company common stock with an aggregate fair value of approximately $62.4 million. The fair value of the consideration transferred was determined based on a $70.53 per share price of the Company’s common stock. The total purchase price was allocated to the developed technology acquired with an estimated useful life o f three years , net assets assumed, and a deferred tax liability related to the developed technology. The excess purchase price was recorded as goodwill, as set forth below. Goodwill generated from the acquisition is attributable to expected synergies from future growth and is not deductible for tax purposes. The following table presents the purchase price allocation related to the acquisition (in thousands): Cash consideration paid $ 45,558 Fair value of common shares issued 114,310 Total consideration 159,868 Post-business combination compensation expense (51,943) Total purchase price 107,925 Net assets assumed (4,099) Deferred tax liabilities 115 Developed technology acquired (4,800) Goodwill $ 99,141 The acquisition has been accounted for as a business combination. The direct transaction costs of the acquisition have been accounted for separately from the business combination and expensed as incurred. Total direct transaction costs incurred by the Company were $0.9 million , which were included in general and administrative expenses in the Company’s consolidated statement of operations for the fiscal year ended March 31, 2021. The Company pa id $0.6 million in acquisition-related expenses incurred by Pixie Labs related to Pixie Labs’ advisors which were included as part of the purchase consideration. The business combination did not have a material impact on the consolidated financial statements and therefore historical and proforma disclosures have not been presented. The acquisition also included a holdback arrangement with certain employees of Pixie Labs, totaling approximately 736,469 shares of the Company’s common stock, contingent upon their continued employment with the Company. The fair value of these awards, which are subject to the recipients’ continued service, was $51.9 million and was excluded from the aggregate purchase price. These awards will be recognized as stock-based compensation expense over the vesting period, which ranges from 18 months to 37 months. IOPipe,Inc. On October 31, 2019, the Company acquired certain assets of IOpipe, Inc., a company that provides monitoring tools for serverless applications, for $5.1 million in cash. The Company held back approximately $0.9 million from the aggregate purchase price which has been accrued as a liability. Of the total purchase price, $1.5 million was allocated to acquired technology with an estimated useful life of three years with the excess $3.6 million of the purchase price over the fair value of the intangible assets acquired recorded as goodwill. The acquisition has been accounted for as a business combination under the acquisition method. Goodwill and other intangibles generated from the acquisition are attributable to expected synergies from future growth and potential future monetization opportunities, and are deductible for tax purposes. The business combination did not have a material impact on the consolidated financial statements and therefore historical and proforma disclosures have not been presented. SignifAI, Inc. On January 25, 2019, the Company acquired all outstanding stock of SignifAI, Inc. (“SignifAI”), an event intelligence company specializing in artificial intelligence and machine learning. The aggregate purchase price of $36.3 million consisted of $25.1 million in cash and 143,861 shares of Company common stock with an aggregate fair value of approximately $11.9 million. The fair value of the consideration transferred was determined based on an $82.69 per share price of the Company’s common stock. The total purchase price was allocated to the developed technology acquired, net liabilities assumed, deferred taxes related to net operating loss carryforwards and a deferred tax liability related to the developed technology. The excess purchase price was recorded as goodwill, as set forth below. The acquisition has been accounted for as a business combination. The business combination did not have a material impact on the Company’s consolidated financial statements and therefore historical and proforma disclosures have not been presented. Per the terms of the merger agreement, all share-based payment awards were accelerated and paid for in cash. The cash consideration paid for unvested share-based payment awards of $0.8 million was recognized as compensation expense separate from the business combination. The acquisition also included a holdback arrangement with certain employees of SignifAI, totaling approximately 152,840 shares of the Company’s common stock, contingent upon their continued employment with the Company. The fair value of these awards, which are subject to the recipients’ continued service, was $12.6 million and was excluded from the aggregate purchase price. These awards are recognized as stock-based compensation expense over the vesting period, which ranges from of 24 months to 36 months from the closing date of the acquisition. The following table presents the purchase price allocation related to the acquisition (in thousands): Cash consideration paid $ 25,119 Fair value of common shares issued 24,535 Total consideration 49,654 Post-business combination compensation expense (12,639) Cash paid to settle unvested stock options (764) Total purchase price 36,251 Net liabilities assumed 259 Deferred tax liabilities 2,289 Deferred tax assets (1,721) Developed technology acquired (10,900) Goodwill $ 26,178 CoScale NV On October 9, 2018, the Company acquired certain assets of CoScale NV (“CoScale”), a public limited liability company organized and existing under the laws of Belgium that provides solutions for monitoring the performance of software container environments for $6.3 million in cash. The Company held back approximately $0.9 million from the aggregate purchase price. Of the total purchase price, $2.9 million was allocated to acquired technology with an estimated useful life of three years, with the excess $3.4 million of the purchase price over the fair value of intangible assets acquired recorded as goodwill. The acquisition has been accounted for as a business combination under the acquisition method. Goodwill and other intangibles generated from the acquisition are attributable to expected synergies from future growth and potential future monetization opportunities, and are deductible for tax purposes. The business combination did not have a material impact on the Company's consolidated financial statements and therefore historical and proforma disclosures have not been presented.

Joint Venture

Joint Venture	12 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Joint Venture	Joint Venture On July 13, 2018, the Company entered into an agreement with Japan Cloud Computing L.P. (“JCC”) and M30 LLC (collectively, the Investors) to engage in the investment, organization, management and operation of New Relic K.K., a Japanese subsidiary of the Company that is focused on the sale of the Company’s products and services in Japan. On August 21, 2018, the investors initially contributed approximately $3.6 million (396,000,000 Japanese Yen) in exchange for 40% of the outstanding common stock of New Relic K.K. On August 21, 2019, the Company and Investors additionally contributed approximately $1.5 million (156,000,000 Japanese Yen) and approximately $1.0 million (104,000,000 Japanese Yen), respectively, to subscribe to additional shares. As of March 31, 2021, the Company owned approximately 60% of the outstanding common stock in New Relic K.K. All of the common stock held by the Investors may be callable by the Company or puttable by the Investors upon certain contingent events. Should the call or put option be exercised, the redemption value would be determined based on a prescribed formula derived from the discrete revenues of New Relic K.K. and the Company and may be settled, at the Company’s discretion, with Company stock or cash. As a result of the put right available to the redeemable non-controlling interest holders in the future, the redeemable non-controlling interest in New Relic K.K. is classified outside of permanent equity in the Company’s consolidated balance sheet as of March 31, 2021, and the balance is reported at the greater of the initial carrying amount adjusted for the redeemable non-controlling interest’s share of earnings or losses, or its estimated redemption value. Accordingly, the Company adjusted the redeemable non-controlling interest by $3.1 million at March 31, 2021. The following table summarizes the activity in the redeemable non-controlling interest for the period indicated below: March 31, 2021 March 31, 2020 Balance, beginning of period $ 1,669 $ 2,733 Investment by redeemable non-controlling interest — 978 Net loss attributable to redeemable non-controlling interest (1,421) (2,042) Adjustment to redeemable non-controlling interest 3,141 — Balance, end of period $ 3,389 $ 1,669

Revenue

Revenue	12 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The Company offers a comprehensive suite of products delivered on its open and extensible cloud-based platform that enable organizations to collect, store and analyze massive amounts of data in real time so they can better operate their applications and infrastructure and improve their digital customer experience. The Company generates revenue from subscription-based arrangements and usage-based arrangements that allow customers to access its products and/or platform. The Company determines revenue recognition through the following steps: (i) identification of the contract, or contracts with a customer, (ii) identification of the performance obligations in the contract, (iii) determination of the transaction price, (iv) allocation of the transaction price to the performance obligations in the contract, and (v) recognition of revenue, when, or as, the Company satisfies a performance obligation. Revenue from subscription-based arrangements is recognized on a ratable basis over the contractual subscription period of the arrangement beginning when or as control of the promised goods or services is transferred to the customer. Beginning in the second quarter of fiscal 2021, the Company started offering usage-based pricing to its customers. Customers have the option to be charged upon their incurred usage in arrears (“Pay as You Go”), or they may commit to a minimum spend over their contracted period (“Annual Pool of Funds”). Revenue related to Pay as You Go contracts are recognized based on the customers’ actual usage. Revenue related to Annual Pool of Funds contracts are recognized on a ratable basis over the contract period including an estimate of the usage above the minimum commitment. The estimated usage-based revenues are constrained to the amount the Company expects to be entitled to receive in exchange for providing access to its platform. Deferred revenue consists of billings or payments received in advance of revenue being recognized. Disaggregation of Revenue For disaggregated revenue by geography, refer to Note 16—Revenue by Geographic Location. Contract Balances In a response to the COVID-19 pandemic, the Company performed additional procedures to evaluate the creditworthiness of its customers and assess collectability of accounts. Using a current expected credit loss model, the Company determined that, while there may be a delay in collections due to the downturn in economic activity, there has not been a material impact to the risk of credit loss on accounts receivables as of March 31, 2021. The Company receives payments from customers based upon billing cycles. As the Company performs under customer contracts, its right to consideration that is unconditional is considered to be accounts receivable. If the Company’s right to consideration for such performance is contingent upon a future event or satisfaction of additional performance obligations, the amount of revenues the Company has recognized in excess of the amount it has billed to the customer is considered to be a contract asset. Contract assets were $2.5 million and $0.1 million as of March 31, 2021 and March 31, 2020, respectively. The Company has no asset impairment charges related to contract assets for the periods presented. Deferred revenue represents considerations received from customers in excess of revenues recognized. The following table presents the changes to the Company’s deferred revenue (in thousands): March 31, 2021 March 31, 2020 Deferred revenue, beginning of period $ 316,327 $ 271,597 Contributions from contract asset 2,446 (171) Billings 724,143 644,411 Revenue recognized (667,648) (599,510) Deferred revenue, end of period $ 375,268 $ 316,327 During the fiscal years ended March 31, 2021 and 2020, approximately 47% and 44% of total revenue recognized, respectively, was from the deferred revenue balances at the beginning of each period. Contract Acquisition Costs The Company capitalizes certain contract acquisition costs primarily consisting of commissions. The balances of deferred costs to obtain customer contracts were $68.8 million and $60.2 million as of March 31, 2021 and March 31, 2020, respectively. In the fiscal years ended March 31, 2021 and 2020, amortization from amounts capitalized was $38.3 million and $32.7 million, respectively. In the fiscal years ended March 31, 2021 and 2020, amounts expensed as incurred were $14.5 million and $13.3 million, respectively. The Company had no impairment loss in relation to costs capitalized. Remaining Performance Obligations The Company’s contracts with customers generally include one main performance obligation, which is access to its SaaS-based products and platform. Within the main performance obligation, each service is generally considered a distinct stand-ready obligation that is recognized over the contract term based on the passage of time. As of March 31, 2021, the aggregate unrecognized transaction price of remaining performance obligations was $726.8 million. The Company expects to recognize more than 91% of the balance as revenue in the 24 months following March 31, 2021 and the remainder thereafter. The aggregate balance of remaining performance obligations represents contracted revenue that has not yet been recognized and does not include contract amounts which are cancelable by the customer and amounts associated with optional renewal periods.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company reports assets and liabilities recorded at fair value on the Company’s consolidated balance sheets based upon the level of judgment associated with inputs used to measure their fair value. The categories are as follows: Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2—Inputs are quoted prices for similar assets and liabilities in active markets; quoted prices for identical assets or liabilities in markets with insufficient volume or infrequent transactions (less active markets); or inputs other than quoted prices that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments. Level 3—Inputs are unobservable inputs based on the Company’s own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation. The following tables present information about the Company’s financial assets measured at fair value on a recurring basis as of March 31, 2021 and 2020 based on the three-tier fair value hierarchy (in thousands): Fair Value Measurements as of March 31, 2021 Level 1 Level 2 Level 3 Total Cash and cash equivalents: Money market funds $ 101,626 $ — $ — $ 101,626 Short-term investments: Certificates of deposit — 48,099 — 48,099 Commercial paper — 11,681 — 11,681 Corporate notes and bonds — 39,873 — 39,873 U.S. treasury securities 475,601 — — 475,601 Restricted cash: Money market funds 5,642 — — 5,642 Total $ 582,869 $ 99,653 $ — $ 682,522 Included in cash and cash equivalents $ 101,626 Included in short-term investments $ 575,254 Included in restricted cash $ 5,642 Fair Value Measurements as of March 31, 2020 Level 1 Level 2 Level 3 Total Cash and cash equivalents: Money market funds $ 107,663 $ — $ — $ 107,663 U.S treasury securities 27,938 — — 27,938 U.S. government agencies — 24,999 — 24,999 Short-term investments: Certificates of deposit — 14,986 — 14,986 Commercial paper — 13,334 — 13,334 Corporate notes and bonds — 60,319 — 60,319 U.S. treasury securities 422,333 — — 422,333 U.S. government agencies — 1,602 — 1,602 Restricted cash: Money market funds 5,641 — — 5,641 Total $ 563,575 $ 115,240 $ — $ 678,815 Included in cash and cash equivalents $ 160,600 Included in short-term investments $ 512,574 Included in restricted cash $ 5,641 There were no transfers between fair value measurement levels during the fiscal years ended March 31, 2021 and 2020. The Company invests in certificates of deposit, commercial paper, corporate debt securities, U.S. treasury securities, and U.S. agency securities, which are classified as available-for-sale securities. The following table presents our available-for-sale securities as of March 31, 2021 (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Fair Value Short-term investments: Certificates of deposit $ 48,100 $ 18 $ (19) $ 48,099 Commercial paper 11,676 5 — 11,681 Corporate notes and bonds 39,620 261 (8) 39,873 U.S. treasury securities 474,171 1,575 (145) 475,601 Total available-for-sale investments $ 573,567 $ 1,859 $ (172) $ 575,254 The following table presents the Company’s available-for-sale securities as of March 31, 2020 (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash and cash equivalents: U.S. treasury securities $ 27,923 $ 15 $ — $ 27,938 U.S. government agencies 24,995 4 — 24,999 Short-term investments: Certificates of deposit 15,000 20 (34) 14,986 Commercial paper 13,318 16 — 13,334 Corporate notes and bonds 60,211 221 (113) 60,319 U.S. treasury securities 415,889 6,444 — 422,333 U.S. government agencies 1,600 2 — 1,602 Total available-for-sale investments $ 558,936 $ 6,722 $ (147) $ 565,511 As of March 31, 2021 and 2020, securities that were in an unrealized loss position for more than 12 months were not significant. In addition, the Company did not consider any available-for-sale securities to be impaired as of March 31, 2021 or 2020 . The following table classifies the Company’s available-for-sale short-term investments by contractual maturities as of March 31, 2021 and 2020 (in thousands): March 31, 2021 March 31, 2020 Due within one year $ 299,032 $ 320,582 Due after one year and within three years 276,222 191,992 Total $ 575,254 $ 512,574 For certain other financial instruments, including accounts receivable, accounts payable and other current liabilities, the carrying amounts approximate their fair value due to the relatively short maturity of these balances. Convertible Senior Notes As of March 31, 2021, the fair value of our 0.50% convertible senior notes due 2023 (the “Notes”) was $442.9 million. The fair value was determined based on the quoted price of the Notes in an inactive market on the last trading day of the reporting period and has been classified as Level 2 in the fair value hierarchy.

Property and Equipment

Property and Equipment	12 Months Ended
	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment, net, consisted of the following (in thousands): March 31, 2021 March 31, 2020 Computers, software, and equipment $ 14,270 $ 13,249 Site operation equipment 87,479 102,316 Furniture and fixtures 5,758 4,802 Leasehold improvements 49,751 39,081 Capitalized software development costs 66,451 50,440 Total property and equipment 223,709 209,888 Less: accumulated depreciation and amortization (132,401) (109,594) Total property and equipment, net $ 91,308 $ 100,294 Depreciation and amortization expense related to property and equipment during the fiscal years ended March 31, 2021, 2020, and 2019 was $44.3 million, $41.1 million, and $25.9 million, respectively.

0.5% Convertible Senior Notes a

0.5% Convertible Senior Notes and Capped Call	12 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
0.5% Convertible Senior Notes and Capped Call	0.5% Convertible Senior Notes and Capped Call In May 2018, the Company issued $500.25 million in aggregate principal amount of Notes in a private offering, including an additional $65.25 million aggregate principal amount of such notes pursuant to the exercise in full of the initial purchasers’ over-allotment option. The Notes are the Company’s senior unsecured obligations and bear interest at a fixed rate of 0.5% per annum, payable semi-annually in arrears on May 1 and November 1 of each year, commencing on November 1, 2018. The Notes will mature on May 1, 2023, unless earlier converted or repurchased. Each $1,000 principal amount of the Notes will initially be convertible into 9.02 shares of the Company’s common stock (the “Conversion Option”), which is equivalent to an initial conversion price of approximately $110.81 per share. The Notes will be convertible at the option of the holders at any time prior to the close of business on the business day immediately preceding November 1, 2022, only under the following circumstances: (1) during any fiscal quarter commencing after the fiscal quarter ending on September 30, 2018 (and only during such fiscal quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any five consecutive trading day period (the “measurement period”) in which the trading price (as defined in the indenture governing the Notes) per $1,000 principal amount of Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate for the Notes on each such trading day; or (3) upon the occurrence of specified corporate events as set forth in the indenture governing the Notes. On or after November 1, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. Upon conversion, the Company may satisfy its conversion obligation by paying and/or delivering, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock, at the Company’s election, in the manner and subject to the terms and conditions provided in the indenture governing the Notes. The conversion rate is subject to adjustment under certain circumstances in accordance with the terms of the indenture governing the Notes. In addition, following certain corporate events that occur prior to the maturity date, the Company will increase the conversion rate, in certain circumstances, for a holder who elects to convert its Notes in connection with such a corporate event. During the three and twelve months ended March 31, 2021, the conditions allowing holders of the Notes to convert have not been met. The Notes were therefore not convertible during the twelve months ended March 31, 2021 and were classified as long-term debt for such period. In accounting for the transaction, the Notes were separated into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar debt instrument that does not have an associated conversion feature. The carrying amount of the equity component representing the Conversion Option was $102.5 million and was determined by deducting the fair value of the liability component from the proceeds received upon issuance of the Notes. The equity component was recorded in additional paid-in capital and is not remeasured as long as it continues to meet the conditions for equity classification. The excess of the principal amount of the Notes over the liability component (the “Debt Discount”) and the debt issuance costs are amortized to interest expense over the contractual term of the Notes at an effective interest rate of 5.74%. This rate is inclusive of the issuance costs. In accounting for the debt issuance costs of $11.6 million related to the Notes, the Company allocated the total amount incurred to the liability and equity components using the same proportions as the proceeds of the Notes. Issuance costs attributable to the liability component were $9.2 million and will be amortized to interest expense using the effective interest method over the contractual term of the Notes. Issuance costs attributable to the equity component were $2.4 million and netted with the equity component in additional paid-in capital. The net carrying amount of the liability component of the Notes as of March 31, 2021 and 2020 was as follows (in thousands): March 31, 2021 March 31, 2020 Principal $ 500,250 $ 500,250 Unamortized debt discount (46,378) (66,894) Unamortized issuance costs (4,492) (6,312) Net carrying amount $ 449,380 $ 427,044 Interest expense related to the Notes is as follows (in thousands): March 31, 2021 March 31, 2020 Amortization of debt discount $ 20,516 $ 19,480 Amortization of issuance costs 1,820 1,627 Contractual interest expense 2,501 2,501 Total interest expense $ 24,837 $ 23,608 In connection with the offering of the Notes, the Company entered into privately negotiated capped call transactions with certain counterparties (the “Capped Calls”). The Capped Calls each have an initial strike price of approximately $110.81 per share, subject to certain adjustments, which correspond to the initial conversion price of the Notes. The Capped Calls have initial cap prices of $173.82 per share, subject to certain adjustments. The Capped Calls cover, subject to anti-dilution adjustments, approximately 4.5 million shares of our common stock. Conditions that cause adjustments to the initial strike price of the Capped Calls mirror conditions that result in corresponding adjustments for the Notes. The Capped Calls are generally intended to reduce potential dilution to holders of the Company’s common stock upon any conversion of the Notes and/or offset any cash payments New Relic is required to make in excess of the principal amount of converted Notes, as the case may be, with such reduction and/or offset, as the case may be, subject to a cap based on the cap price. For accounting purposes, the Capped Calls are separate transactions, and not part of the terms of the Notes. As these transactions meet certain accounting criteria, the Capped Calls are recorded in stockholders’ equity and are not accounted for as derivatives. The cost of $63.2 million incurred in connection with the Capped Calls was recorded as a reduction to additional paid-in capital. The net impact related to stockholders’ equity has been included in additional paid-in capital and was a result of the issuance costs of $2.4 million and the purchase of capped calls noted above in the amount of $63.2 million.

Goodwill and Purchased Intangib

Goodwill and Purchased Intangibles Assets	12 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Purchased Intangibles Assets	Goodwill and Purchased Intangibles Assets The changes in the carrying amount of goodwill for the twelve months ended March 31, 2021 consist of the following (in thousands): Goodwill as of March 31, 2020 $ 45,112 Goodwill acquired 99,141 Goodwill as of March 31, 2021 $ 144,253 Purchased intangible assets subject to amortization as of March 31, 2021 consisted of the following (in thousands): Gross Carrying Accumulated Net Carrying Developed technology $ 20,116 $ (7,130) $ 12,986 Purchased intangible assets subject to amortization as of March 31, 2020 consisted of the following (in thousands): Gross Carrying Accumulated Net Carrying Developed technology $ 15,316 $ (1,625) $ 13,691 Amortization expense of purchased intangible assets for the fiscal years ended March 31, 2021, 2020, and 2019 was $5.5 million, $1.7 million, and $1.3 million, respectively. Estimated future amortization expense as of March 31, 2021 is as follows (in thousands): Fiscal Years Ending March 31, Estimated Future Amortization Expense 2022 $ 6,219 2023 5,567 2024 1,200 $ 12,986

Other Current Liabilities

Other Current Liabilities	12 Months Ended
	Mar. 31, 2021
Other Liabilities Disclosure [Abstract]
Other Current Liabilities	Other Current Liabilities Other current liabilities consisted of the following (in thousands): As of March 31, 2021 2020 Accrued liabilities $ 4,050 $ 4,615 Accrued tax liabilities 1,042 2,940 Other 14,082 5,565 Total other current liabilities $ 19,174 $ 13,120

Leases

Leases	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	Leases The following table presents information about leases on the consolidated balance sheet (in thousands): March 31, 2021 March 31, 2020 Assets Lease right-of-use-assets $ 57,425 $ 57,777 Liabilities Lease liabilities $ 7,886 $ 8,682 Lease liabilities, non-current 59,924 57,394 Total operating lease liabilities $ 67,810 $ 66,076 As of March 31, 2021, the weighted average remaining lease term was 6.2 years and the weighted average discount rate was 6.9%. The following table presents information about leases on its consolidated statement of operations (in thousands): Fiscal Year Ended March 31, 2021 2020 Operating lease expense $ 13,870 $ 14,220 Short-term lease expense 843 1,074 Variable lease expense 2,581 2,682 Rent expense for operating leases, net of sublease income, was $14.5 million for the fiscal year ended March 31, 2019. The following table presents supplemental cash flow information about the Company’s leases (in thousands): Fiscal Year Ended March 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities $ 15,666 $ 11,372 Operating lease assets obtained in exchange for new lease liabilities (1) 8,525 (9,211) (1) Includes the impact of new leases as well as remeasurements and modifications to existing leases. As of March 31, 2021, remaining maturities of lease liabilities were as follows (in thousands): Fiscal Years Ending March 31, Operating Leases 2022 $ 12,187 2023 14,228 2024 13,318 2025 11,712 2026 11,911 Thereafter 20,913 Total operating lease payments $ 84,269 Less imputed interest (16,459) Total operating lease liabilities $ 67,810

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Commitments —As of March 31, 2021 and 2020, the Company had purchase commitments of $494.6 million and $64.7 million, respectively, primarily related to data center, cloud and hosting services. In September 2020, the Company entered into an agreement with a public cloud hosting provider, under which it now has a total five Other Contingencies —In the normal course of business, the Company may agree to indemnify third parties with whom it enters into contractual relationships, including customers, lessors, and parties to other transactions with the Company, with respect to certain matters. The Company has agreed, under certain conditions, to hold these third parties harmless against specified losses, such as those arising from a breach of representations or covenants, other third-party claims that the Company’s products when used for their intended purposes infringe the intellectual property rights of such other third parties, or other claims made against certain parties. To date, the Company has not incurred any costs as a result of such obligations and has not accrued any liabilities related to such obligations in the consolidated financial statements. In addition, the Company indemnifies its officers, directors, and certain key employees while they are serving in good faith in their respective capacities. The Company does not currently believe there is a reasonable possibility that a loss may have been incurred under these indemnification obligations. To date, there have been no claims under any such indemnification provisions.

Common Stock and Stockholders'

Common Stock and Stockholders' Equity	12 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Common Stock and Stockholders' Equity	Common Stock and Stockholders’ Equity Common stock reserved for issuance —The Company had reserved shares of common stock for future issuance pursuant to equity plans as follows (in thousands): As of March 31, 2021 2020 Common stock options outstanding 2,718 2,850 RSUs and PSUs outstanding 3,405 3,100 Available for future stock option, RSU, and PSU grants 12,281 11,460 Available for future employee stock purchase plan awards 2,702 2,504 21,106 19,914 Employee Stock Purchase Plan —The Company’s board of directors adopted, and the Company’s stockholders approved, the Company’s 2014 Employee Stock Purchase Plan (“ESPP”), which became effective in December 2014. The ESPP initially reserved and authorized the issuance of up to 1,000,000 shares of common stock. The ESPP provides that the number of shares reserved and available for issuance under the ESPP automatically increases each April, beginning on April 1, 2015, by the lesser of 500,000 shares, 1% of the number of the Company’s common stock shares issued and outstanding on the immediately preceding March 31, or such lesser number of shares as determined by the Company’s board of directors. For the fiscal years ended March 31, 2021, 2020, and 2019, 0.3 million shares, 0.3 million shares, and 0.2 million shares of common stock were purchased under the ESPP, respectively, and a total of $5.5 million, $5.3 million, and $3.6 million of stock-based compensation expense was recorded, respectively. As of March 31, 2021, 2,701,577 shares of common stock were available for issuance under the ESPP. 2008 Equity Incentive Plan —The Company’s board of directors adopted, and the Company’s stockholders approved, the 2008 Equity Incentive Plan, or the 2008 Plan, in February 2008. The 2008 Plan was terminated in connection with the Company’s initial public offering (“IPO”), and accordingly, no shares are available for future issuance under this plan. The 2008 Plan continues to govern outstanding awards granted thereunder. 2014 Equity Incentive Plan —The Company’s board of directors adopted, and the Company’s stockholders approved, the Company’s 2014 Equity Incentive Plan (the “2014 Plan”), which became effective in December 2014. The 2014 Plan serves as the successor to the Company’s 2008 Plan. The 2014 Plan initially reserved and authorized the issuance of 5,000,000 shares of the Company’s common stock. Additionally, shares not issued or subject to outstanding grants under the 2008 Plan upon its termination became available under the 2014 Plan, resulting in a total of 5,184,878 available shares under the 2014 Plan as of the effective date of the 2014 Plan. Pursuant to the terms of the 2014 Plan, any shares subject to outstanding stock options or other stock awards under the 2008 Plan that (i) expire or terminate for any reason prior to exercise or settlement, (ii) are forfeited because of the failure to meet a contingency or condition required to vest such shares or otherwise return to the Company or (iii) are reacquired, withheld (or not issued) to satisfy a tax withholding obligation in connection with an award or to satisfy the purchase price or exercise price of a stock award will become available for issuance pursuant to awards granted under the 2014 Plan. The 2014 Plan provides that the number of shares reserved and available for issuance under the plan automatically increases each April 1, beginning on April 1, 2015, by 5% of the outstanding number of shares of the Company’s common stock shares issued and outstanding on the immediately preceding March 31, or such lesser number of shares as determined by the Company’s board of directors. As of March 31, 2021, there were 12,280,588 shares available for issuance under the 2014 Plan. The following table summarizes the Company’s stock option, restricted stock unit (“RSU”), and performance unit (“PSU”) award activities for the fiscal year ended March 31, 2021 (in thousands, except exercise price, contractual term and fair value information): Options Outstanding RSUs and PSUs Outstanding Number of Shares Weighted- Weighted-Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Number of Weighted- Weighted- Aggregate Outstanding—April 1, 2020 2,850 $ 44.52 6.4 $ 43,576 3,100 $ 74.20 2.7 $ 143,346 Stock options granted 716 62.50 RSUs and PSUs granted (1) 3,030 64.28 Stock options exercised (462) 14.86 20,641 RSUs and PSUs vested (1,536) 69.67 Stock options canceled/forfeited (386) 70.88 RSUs and PSUs canceled/forfeited (1,189) 70.29 Outstanding - March 31, 2021 2,718 $ 50.55 6.2 $ 48,064 3,405 $ 68.78 2.8 $ 209,343 Options vested and expected to vest - March 31, 2021 2,700 $ 50.46 6.1 $ 48,025 Options vested and exercisable - March 31, 2021 1,780 $ 40.36 4.9 $ 47,426 RSUs and PSUs expected to vest - March 31, 2021 3,216 $ 68.79 $ 197,727 (1) The above table includes 111,965 performance unit awards and does not include any time-based restricted stock issued as consideration for an acquisition which are further detailed in the table below. PSUs granted under the 2014 Plan are contingent upon the achievement of pre-determined market and service conditions. The number of shares of common stock to be issued at vesting will range from 0% to 200% of the target number based on the Company’s total shareholder return (“TSR”) relative to the performance of peer companies for each measurement period, over a one two three The weighted-average grant-date fair value of options granted during the fiscal years ended March 31, 2021, 2020, and 2019 was $26.51, $30.67, and $42.37, respectively. Intrinsic value of options exercised during the fiscal years ended March 31, 2021, 2020, and 2019 was $20.6 million, $23.8 million, and $62.5 million, respectively. The total fair value of RSUs vested during the fiscal years ended March 31, 2021, 2020, and 2019 was $107.1 million, $63.3 million, and $38.2 million, respectively. Aggregate intrinsic value for options, RSUs, and PSUs outstanding represents the difference between the closing stock price of the Company’s common stock and the exercise price of outstanding, in-the-money awards. The Company’s closing stock price as reported on the New York Stock Exchange as of March 31, 2021, the last trading day of fiscal 2021, was $61.48. The following table summarizes the time-based restricted stock issued as consideration for an acquisition during the fiscal years ended March 31, 2021, 2020, and 2019: Fiscal Years Ending March 31, Number of Shares of Time-Based Restricted Stock Granted as Consideration for Acquisitions 2019 152,840 (1) 2020 — 2021 736,469 (2) (1) These shares were issued in connection with the SignifAI acquisition, which included a holdback arrangement with certain employees of SignifAI. These shares are subject to the recipients’ continued service and will be recognized as stock-based compensation expense over the vesting periods, which range from 24 months to 36 months from the closing date of the acquisition. (2) These shares were issued in connection with the Pixie Labs acquisition, which included a holdback arrangement with certain employees of Pixie Labs. These shares are subject to the recipients’ continued service and will be recognized as stock-based compensation expense over the vesting periods, which range from 18 months to 37 months from the closing date of the acquisition. Employee Stock Options and ESPP Valuation —The Company estimates the fair value of stock options and ESPP shares on the date of grant using the Black-Scholes option-pricing model. Each of the Black-Scholes inputs is subjective and generally requires significant judgments to determine. The assumptions used to estimate the fair value of stock options granted and ESPP shares to be issued during the fiscal years ended March 31, 2021, 2020, and 2019 were as follows: Stock Options: Fiscal Year Ended March 31, 2021 2020 2019 Expected term (years) 6 6 6 Expected volatility 44 - 46% 41 - 42% 41 - 42% Risk-free interest rate 0.34 - 0.76% 1.45 - 3.06% 2.27 - 3.06% Dividend yield — — — ESPP: Fiscal Year Ended March 31, 2021 2020 2019 Expected term (years) 0.5 0.5 0.5 Expected volatility 55 - 76% 33 - 60% 37 - 53% Risk-free interest rate 0.06 - 0.12% 1.56 - 1.86% 2.23 - 2.50% Dividend yield — — — Risk-Free Interest Rate The Company bases the risk-free interest rate used in the Black-Scholes option-pricing model on the implied yield available on U.S. Treasury zero-coupon issues with an equivalent expected term of the options for each option group. Expected Term The Company determines the expected term based on the average period the stock options are expected to remain outstanding generally calculated as the midpoint of the stock options vesting term and contractual expiration period. The Company estimates the expected term for ESPP shares using the purchase period of 6 months. Expected Volatility Beginning in April 2020, the expected volatility for options granted is based on the historical volatility of the Company’s common stock. The expected volatility for options granted prior to April 2020 was based on the historical volatilities of our publicly traded peer group. The Company uses historical volatility data when valuing ESPP shares. Dividend Yield The expected dividend assumption is based on the Company’s current expectations about its anticipated dividend policy. Stock-Based Compensation Expense —Aggregate stock-based compensation expense for employees and nonemployees was $135.1 million, $99.5 million, and $56.2 million for the fiscal years ended March 31, 2021, 2020, and 2019, respectively. Cost of revenue, research and development, sales and marketing, and general and administrative expenses were as follows (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 Cost of revenue $ 5,939 $ 5,303 $ 3,487 Research and development 40,964 31,703 17,634 Sales and marketing 54,695 43,548 23,253 General and administrative 33,545 18,982 11,824 Total stock-based compensation expense $ 135,143 $ 99,536 $ 56,198 As of March 31, 2021, unrecognized stock-based compensation cost related to outstanding unvested stock options was $25.4 million, which is expected to be recognized over a weighted-average period of approximately 2.6 years. As of March 31, 2021, unrecognized stock-based compensation cost related to outstanding unvested stock awards was $249.8 million, which is expected to be recognized over a weighted-average period of approximately 2.8 years. As of March 31, 2021 unrecognized stock-based compensation cost related to PSUs was $4.9 million, which is expected to be recognized over a weighted-average period of approximately 2.0 years.

Income Taxes

Income Taxes	12 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The components of income (loss) before income taxes were as follows (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 Domestic $ (193,262) $ (93,687) $ (46,838) Foreign 2,931 2,919 5,779 Total $ (190,331) $ (90,768) $ (41,059) The components of the provision for income taxes were as follows (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 Current Provision: Federal $ — $ (1,177) $ (269) State (9) 34 32 Foreign 685 1,632 1,742 Total current provision 676 489 1,505 Deferred Provision: Federal 35 — (568) State (96) — — Foreign (56) (278) (240) Total deferred provision (117) (278) (808) Total income tax provision $ 559 $ 211 $ 697 The items accounting for the difference between income taxes computed at the federal statutory rate and the provision for income taxes consisted of the following: Fiscal Year Ended March 31, 2021 2020 2019 Federal statutory rate 21.0 % 21.0 % 21.0 % Effect of: State taxes, net of federal benefits 3.0 3.0 5.0 Stock-based compensation (1.5) (0.4) 35.2 Research and development credits, net of ASC 740-10 2.4 5.1 8.7 Permanent items (2.4) (4.0) (3.9) Foreign taxes 0.2 0.4 (0.3) Business combination — — 1.4 Intraperiod allocation — 1.5 — Other 0.7 0.7 0.7 Valuation allowance (23.7) (27.5) (69.5) Effective tax rate (0.3) % (0.2) % (1.7) % Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented (in thousands): As of March 31, 2021 2020 Deferred tax assets: Accrued expenses $ 3,429 $ 2,400 Depreciation and amortization 3,518 395 Net operating loss and other attribute carryforwards 178,535 139,765 Stock based compensation 14,987 12,353 Research and development credits 25,932 21,101 Lease liability 15,208 14,830 Other 378 451 Gross deferred tax assets 241,987 191,295 Valuation allowance (198,794) (151,281) Total deferred tax assets 43,193 40,014 Deferred tax liabilities: Prepaids (3,949) (2,474) Intangibles (1,923) (1,989) Capitalized research and development (4,405) (2,739) Deferred contract acquisition costs (15,520) (13,499) Convertible debt (3,991) (5,810) Right of use asset (12,748) (12,847) Total deferred tax liabilities (42,536) (39,358) Total net deferred tax assets/(liabilities) $ 657 $ 656 The Company accounts for deferred taxes under ASC 740, Income Taxes , which requires a reduction of the carrying amounts of deferred tax assets by a valuation allowance if, based on available evidence, it is more likely than not that such assets will not be realized. Accordingly, the need to establish valuation allowances for deferred tax assets is assessed periodically based on the ASC 740 more-likely-than-not realization threshold. This assessment considers matters such as future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies and results of recent operations. The evaluation of the recoverability of the deferred tax assets requires that we weigh all positive and negative evidence to reach a conclusion that it is more likely than not that all or some portion of the deferred tax assets will not be realized. The weight given to the evidence is commensurate with the extent to which it can be objectively verified. Based upon the weight of available evidence, which includes the Company’s historical operating performance and the U.S. and Japan cumulative net losses in all prior periods, the Company has provided a valuation allowance against its U.S. and Japan deferred tax assets. Overall, the valuation allowance increased by $47.5 million and $24.5 million for the years ended March 31, 2021 and 2020, respectively. As of March 31, 2021, the Company has U.S. federal and state net operating losses of approximately $707.8 million and $389.0 million, respectively, which expire beginning in the years 2028 and 2020. Of the $707.8 million federal net operating losses, $286.6 million are carried forward indefinitely but are limited to 80 % of taxable income. The remaining $421.2 million begin to expire in 2028. As of March 31, 2021, the Company also has Federal, California and Oregon research and development credits of $28.6 million, $5.2 million, and $2.0 million, respectively. The federal tax credit carryforwards will expire beginning in 2028 if not utilized. The California credit carryforwards do not expire. The Oregon tax credit carryforwards began to expire in 2020. Utilization of the net operating loss carryforwards may be subject to a substantial annual limitation due to the ownership change limitations provided by the Code, and similar state provisions. The annual limitation may result in the expiration of net operating losses and credits before utilization. Section 382 of the Code (“Section 382”) ownership change generally occurs if one or more stockholders or groups of stockholders who own at least 5% of the Company’s stock increase their ownership by more than 50 percentage points over their lowest ownership percentage within a rolling three-year period. Similar rules may apply under state tax laws. The Company did experience one or more ownership changes in financial periods ending on or before March 31, 2021. In this regard, the Company has determined that based on the timing of the ownership changes and the corresponding Section 382 limitations, none of its net operating losses or other tax attributes are subject to such limitation. The Company has adopted authoritative guidance which prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of uncertain tax positions taken or expected to be taken in the Company’s income tax return, and also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. The Company had unrecognized tax benefits of $12.2 million, $10.3 million, and $8.0 million as of March 31, 2021, 2020, and 2019. As of March 31, 2021, if recognized, the unrecognized tax benefit of $11.8 million would not affect income tax expense before consideration of any valuation allowance. The Company does not expect the unrecognized tax benefits to change significantly over the next 12 months. Balance at March 31, 2018 $ 6,736 Additions based on tax positions taken during the current period 1,566 Reductions based on tax positions taken during the prior period (305) Balance at March 31, 2019 7,997 Additions based on tax positions taken during the current period 2,183 Additions based on tax positions taken during the prior period 687 Reductions based on tax positions taken during the prior period (529) Balance at March 31, 2020 10,338 Additions based on tax positions taken during the current period 2,667 Additions based on tax positions taken during the prior period 703 Reductions based on tax positions taken during the prior period (1,549) Balance at March 31, 2021 $ 12,159 The Company recognizes interest and penalties related to unrecognized tax benefits within the income tax expense line in the consolidated statement of operations. Accrued interest and penalties have not been material for the fiscal years ended March 31, 2021, 2020, and 2019 . The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was enacted by the United States on March 27, 2020. The CARES Act provides various tax provisions and other stimulus measures, including temporary changes regarding the prior and future utilization of net operating losses, technical corrections to prior tax legislation for tax depreciation of certain qualified improvement property, temporary suspension of certain payment requirements for the employer portion of Social Security taxes, and emergency lending programs. The Company has evaluated the impact of the CARES Act on its consolidated financial statements and has found that it has no material impact on income taxes as of March 31, 2021. The Company will monitor the impact of the CARES Act on an ongoing basis.

Net Loss Per Share

Net Loss Per Share	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share As the Company had net losses for the fiscal years ended March 31, 2021, 2020, and 2019, all potential common shares were determined to be anti-dilutive. Additionally, the 4.5 million shares underlying the conversion option in the Notes are not considered in the calculation of diluted net loss per share as the effect would be anti-dilutive. The Notes were not convertible as of March 31, 2021. The Company expects to settle the principal amount of the Notes in cash and therefore will use the treasury stock method for calculating any potential dilutive effect of the conversion spread on diluted net income per share, if applicable. The following table sets forth the computation of net loss per share, basic and diluted (in thousands, except per share amounts): Fiscal Year Ended March 31, 2021 2020 2019 Numerator: Net loss attributable to New Relic $ (192,610) $ (88,937) $ (40,893) Denominator: Weighted average shares used to compute net loss per share, basic and diluted 61,070 58,601 56,884 Net loss attributable to New Relic per share—basic and diluted $ (3.15) $ (1.52) $ (0.72) The following outstanding options, unvested shares, and ESPP shares were excluded (as common stock equivalents) from the computation of diluted net loss per common share for the periods presented as their effect would have been antidilutive (in thousands): As of March 31, 2021 2020 2019 Options to purchase common stock 2,718 2,850 2,751 RSUs and PSUs 3,405 3,100 2,419 ESPP shares 48 69 29 6,171 6,019 5,199

Employee Benefit Plan

Employee Benefit Plan	12 Months Ended
	Mar. 31, 2021
Postemployment Benefits [Abstract]
Employee Benefit Plan	Employee Benefit PlanThe Company has established a 401(k) tax-deferred savings plan (the “401(k) Plan”), which permits participants to make contributions by salary deduction pursuant to Section 401(k) of the Code. The Company is responsible for administrative costs of the 401(k) Plan and may, at its discretion, make matching contributions to the 401(k) Plan. For the fiscal years ended March 31, 2021, 2020, and 2019, the Company made contributions of $8.3 million, $7.7 million, and $6.3 million to the 401(k) Plan, respectively.

Revenue by Geographic Location

Revenue by Geographic Location	12 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Revenue by Geographic Location	Revenue by Geographic Location The following table shows the Company’s revenue by geographic areas, as determined based on the billing address of its customers (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 United States $ 460,944 $ 417,827 $ 327,341 EMEA 104,184 98,651 87,596 APAC 62,590 50,831 38,466 Other 39,930 32,201 25,822 Total revenue $ 667,648 $ 599,510 $ 479,225 Substantially all of the Company’s long-lived assets were attributable to operations in the United States as of March 31, 2021 and 2020.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Mar. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsCertain members of the Company’s board of directors serve on the board of directors of and/or are executive officers of, and, in some cases, are investors in, companies that are customers or vendors of the Company. Revenue from sales to these companies of an aggregate of $1.7 million, $1.0 million, and $0.2 million was recognized for the fiscal years ended March 31, 2021, 2020, and 2019, respectively. There was not a significant amount of accounts receivable due from these companies as of March 31, 2021 or March 31, 2020. An aggregate of $0.0 million, $1.4 million, and $1.3 million in expenses related to purchases from these companies was recorded during the fiscal years ended March 31, 2021, 2020, and 2019, respectively. There was an aggregate of $0.0 million and $0.1 million in accounts payable to these companies as of March 31, 2021 and 2020, respectively.

Subsequent Events

Subsequent Events	12 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventOn April 6, 2021, the Company announced a restructuring plan to realign its cost structure to better reflect significant product and business model innovation over the past 12 months. As a result of the restructuring plan, the Company expects to incur aggregate charges of approximately $13 million to $16 million for employee terminations and other costs associated with the restructuring plan. Most of these charges are expected to be cash expenditures and recognized in the first quarter of fiscal 2022.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Description of Business	Description of Business and Summary of Significant Accounting PoliciesNew Relic, Inc. (the “Company” or “New Relic”) was incorporated in Delaware on February 20, 2008, when it converted from a Delaware limited liability company called New Relic Software, LLC, which was formed in Delaware in September 2007. The Company delivers the observability platform for engineers to plan, build, deploy and operate more perfect software. New Relic One is the Company’s purpose-built offering for customers to land all of their telemetry data quickly and affordably in one place, and to translate that data into actionable insights.
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation —The consolidated financial statements include the accounts of New Relic and its subsidiaries. These consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles, or GAAP. All intercompany balances and transactions have been eliminated in consolidation.
Foreign Currency Translation and Transactions	Foreign Currency Translation and Transactions —The functional currency of the Company’s foreign subsidiaries is the U.S. dollar. The Company translates all monetary assets and liabilities denominated in foreign currencies into U.S. dollars using the exchange rates in effect at the balance sheet dates and other assets and liabilities using historical exchange rates. Foreign currency-denominated revenue and expenses have been re-measured using the average exchange rates in effect during each period. Foreign currency re-measurement gains and losses have been included in other income (expense).
Use of Estimates	Use of Estimates —The preparation of the Company’s consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of income and expenses during the reporting period. Significant items subject to such estimates and assumptions include the fair value of share-based awards, fair value of purchased intangible assets and goodwill, fair value of debt and equity components related to the 0.5% convertible senior notes due 2023 (the “Notes”), useful lives of purchased intangible assets, unrecognized tax benefits, expected benefit period for deferred commissions, incremental borrowing rate used for operating lease liabilities, and the capitalization and estimated useful life of the Company’s software development costs. These estimates are based on information available as of the date of the consolidated financial statements; therefore, actual results could differ from management’s estimates.
COVID-19	COVID-19 —The COVID-19 pandemic has resulted in a global slowdown of economic activity that is expected to continue and which is likely to decrease demand for a broad variety of goods and services, while also disrupting sales channels and marketing activities for an unknown period of time until the disease is contained. The Company’s revenue and deferred revenue have been negatively impacted by the slowdown in activity associated with the COVID-19 pandemic for the fiscal year ending March 31, 2021, but at this point, the extent of any continuing impact to the Company’s financial condition or results of operations is uncertain, particularly as the COVID-19 pandemic continues to persist for an extended period of time, and as of the date of issuance of these financial statements, management is not aware of any specific event or circumstance that would require an update to estimates and judgments or revising the carrying value of its assets or liabilities. These estimates may change as new events occur and additional information is obtained, and will be recognized in the condensed consolidated financial statements as soon as they become known. Actual results could differ from those estimates and any such differences may be material to the financial statements.
Segments	Segments —The Company’s chief operating decision maker is the Chief Executive Officer, who reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region. Accordingly, the Company has determined that it has a single reportable segment.
Cash and Cash Equivalents	Cash and Cash Equivalents —The Company considers all highly liquid investments with an original maturity of three months or less at the date of purchase to be cash and cash equivalents.
Restricted Cash	Restricted Cash —The Company has an agreement to maintain cash balances at a financial institution as collateral for letters of credit relating to the Company’s property leases.
Short-term Investments	Short-term Investments —Short-term investments consist of money market funds, certificates of deposit, commercial paper, U.S. treasury securities, U.S. agency securities, and corporate debt securities, and are classified as available-for-sale securities. The Company has classified its investments as current based on the nature of the investments and their availability for use in current operations. Available-for-sale securities are carried at fair value with unrealized gains and losses reported as a
Business Combinations	Business Combinations—The Company recognizes identifiable assets acquired and liabilities assumed at their acquisition date fair value. Goodwill as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date fair values of the assets acquired and the liabilities assumed. While the Company uses its best estimates and assumptions as a part of the purchase price allocation process to accurately value assets acquired and liabilities assumed at the acquisition date, its estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed, with the corresponding offset to goodwill to the extent that the Company identifies adjustments to the preliminary purchase price allocation. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company’s consolidated statements of operations.
Property and Equipment	Property and Equipment —Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. The Company uses an estimated useful life of three years for employee-related computers and software, three years for other office equipment and site-related computer hardware, and five years for furniture. Leasehold improvements are amortized over the shorter of the lease-term or the estimated useful life of the related asset. Down payments for property and equipment are recorded at cost and included in other assets in the accompanying consolidated balance sheet. Once the corresponding property and equipment item has been received, it will be reclassified to property and equipment and depreciated.
Revenue Recognition	Revenue Recognition —The Company generates revenue from subscription-based arrangements and usage-based arrangements that allow customers to access its products and/or platform. The Company determines revenue recognition through the following steps: • identification of the contract, or contracts with a customer; • identification of the performance obligations in the contract; • determination of the transaction price; • allocation of the transaction price to the performance obligations in the contract; and • recognition of revenue, when, or as, the Company satisfies a performance obligation. Revenue from subscription-based arrangements is recognized on a ratable basis over the contractual subscription period of the arrangement beginning when or as control of the promised goods or services is transferred to the customer. Beginning in the second quarter of fiscal 2021, the Company started offering usage-based pricing to its customers. Customers have the option to be charged upon their incurred usage in arrears (“Pay as You Go”), or they may commit to a minimum spend over their contracted period (“Annual Pool of Funds”). Revenue related to Pay as You Go contracts are recognized based on the customers’ actual usage. Revenue related to Annual Pool of Funds contracts are recognized on a ratable basis over the contract period including an estimate of the usage above the minimum commitment. The estimated usage-based revenues are constrained to the amount the Company expects to be entitled to receive in exchange for providing access to its platform. Deferred Revenue —Deferred revenue consists of billings or payments received in advance of revenue being recognized. The Company generally invoices its customers monthly, quarterly, or annually. Deferred revenue that will be recognized during the succeeding 12-month period is recorded as current deferred revenue and the remaining portion is recorded as non-current deferred revenue. The Company offers a comprehensive suite of products delivered on its open and extensible cloud-based platform that enable organizations to collect, store and analyze massive amounts of data in real time so they can better operate their applications and infrastructure and improve their digital customer experience. The Company generates revenue from subscription-based arrangements and usage-based arrangements that allow customers to access its products and/or platform. The Company determines revenue recognition through the following steps: (i) identification of the contract, or contracts with a customer, (ii) identification of the performance obligations in the contract, (iii) determination of the transaction price, (iv) allocation of the transaction price to the performance obligations in the contract, and (v) recognition of revenue, when, or as, the Company satisfies a performance obligation. Revenue from subscription-based arrangements is recognized on a ratable basis over the contractual subscription period of the arrangement beginning when or as control of the promised goods or services is transferred to the customer. Beginning in the second quarter of fiscal 2021, the Company started offering usage-based pricing to its customers. Customers have the option to be charged upon their incurred usage in arrears (“Pay as You Go”), or they may commit to a minimum spend over their contracted period (“Annual Pool of Funds”). Revenue related to Pay as You Go contracts are recognized based on the customers’ actual usage. Revenue related to Annual Pool of Funds contracts are recognized on a ratable basis over the contract period including an estimate of the usage above the minimum commitment. The estimated usage-based revenues are constrained to the amount the Company expects to be entitled to receive in exchange for providing access to its platform. Deferred revenue consists of billings or payments received in advance of revenue being recognized. Disaggregation of Revenue For disaggregated revenue by geography, refer to Note 16—Revenue by Geographic Location. The Company receives payments from customers based upon billing cycles. As the Company performs under customer contracts, its right to consideration that is unconditional is considered to be accounts receivable. If the Company’s right to consideration for such performance is contingent upon a future event or satisfaction of additional performance obligations, the amount of revenues the Company has recognized in excess of the amount it has billed to the customer is considered to be a contract asset. Contract assets were $2.5 million and $0.1 million as of March 31, 2021 and March 31, 2020, respectively. The Company has no asset impairment charges related to contract assets for the periods presented. Deferred revenue represents considerations received from customers in excess of revenues recognized. The following table presents the changes to the Company’s deferred revenue (in thousands): March 31, 2021 March 31, 2020 Deferred revenue, beginning of period $ 316,327 $ 271,597 Contributions from contract asset 2,446 (171) Billings 724,143 644,411 Revenue recognized (667,648) (599,510) Deferred revenue, end of period $ 375,268 $ 316,327 During the fiscal years ended March 31, 2021 and 2020, approximately 47% and 44% of total revenue recognized, respectively, was from the deferred revenue balances at the beginning of each period. Contract Acquisition Costs The Company capitalizes certain contract acquisition costs primarily consisting of commissions. The balances of deferred costs to obtain customer contracts were $68.8 million and $60.2 million as of March 31, 2021 and March 31, 2020, respectively. In the fiscal years ended March 31, 2021 and 2020, amortization from amounts capitalized was $38.3 million and $32.7 million, respectively. In the fiscal years ended March 31, 2021 and 2020, amounts expensed as incurred were $14.5 million and $13.3 million, respectively. The Company had no impairment loss in relation to costs capitalized. Remaining Performance Obligations The Company’s contracts with customers generally include one main performance obligation, which is access to its SaaS-based products and platform. Within the main performance obligation, each service is generally considered a distinct stand-ready obligation that is recognized over the contract term based on the passage of time. As of March 31, 2021, the aggregate unrecognized transaction price of remaining performance obligations was $726.8 million. The Company expects to recognize more than 91% of the balance as revenue in the 24 months following March 31, 2021 and the remainder thereafter. The aggregate balance of remaining performance obligations represents contracted revenue that has not yet been recognized and does not include contract amounts which are cancelable by the customer and amounts associated with optional renewal periods.
Cost of Revenue	Cost of Revenue —Cost of revenue consists of expenses relating to data center operations, hosting-related costs, payment processing fees, depreciation and amortization, consulting costs, and salaries and benefits of operations and global customer support personnel.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts—Accounts receivable are recorded at the invoiced amount, net of allowances for doubtful accounts. The allowance for doubtful accounts is based on the Company’s assessment of the collectability of accounts. The Company regularly reviews the adequacy of the allowance for doubtful accounts by considering the age of each outstanding invoice and the collection history of each customer to determine whether a specific allowance is appropriate. Accounts receivable deemed uncollectable are charged against the allowance for doubtful accounts when identified.
Software Development Costs	Software Development Costs—The Company capitalizes certain development costs incurred in connection with its internal use software and website. These capitalized costs are primarily related to its software tools that are hosted by the Company and accessed by its customers on a subscription basis. Costs incurred in the preliminary stages of development are expensed as incurred. Once an application has reached the development stage, internal and external costs, if direct and incremental, are capitalized until the software is substantially complete and ready for its intended use. Capitalization ceases when the software is released or made available. The Company also capitalizes costs related to specific upgrades and enhancements when it is probable the expenditures will result in additional features and functionality. Maintenance costs are expensed as incurred. Internal use software is amortized on a straight-line basis over its estimated useful life, generally three years.
Commissions	Commissions —The Company capitalizes incremental commissions related to initial contracts and amortizes such costs over the expected period of benefit, which the Company has determined to be three years, because the commissions paid upon renewal are not commensurate with the commissions paid on initial contracts. The Company determined the period of benefit by taking into consideration the length of its customer contracts, their technology lifecycle, and other factors. Amortization expense is recorded in sales and marketing expense within the consolidated statement of operations. The Company expenses incremental commissions related to renewal contracts, as the commission paid on renewals are generally for contract periods of one year or less
Advertising Expenses	Advertising Expenses—Advertising is expensed as incurred and is included in sales and marketing in the consolidated statements of operations.
Operating Leases	Operating Leases —The Company leases office space under non-cancelable operating leases which expire from 2021 to 2031. All of its office leases are classified as operating leases with lease expense recognized on a straight-line basis over the lease term. Lease right-of-use assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As these leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company considers information including, but not limited to, the lease term, the Company's credit rating and interest rates of similar debt instruments with comparable credit ratings. The lease right-of-use assets are also increased by any lease prepayments made and reduced by any lease incentives such as tenant improvement allowances. Options to extend the lease term are included in the lease term when it is reasonably certain that the Company will exercise the extension option. The Company’s operating leases typically include nonlease components such as common-area maintenance costs. The Company has elected to include nonlease components with lease payments for the purpose of calculating lease right-of-use assets and liabilities, to the extent that they are fixed. Nonlease components that are not fixed are expensed as incurred as variable lease payments. Leases with a term of one year or less are not recognized on the Company’s consolidated balance sheet.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets—Long-lived assets, such as property and equipment, acquired intangible assets, and capitalized software development costs subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. If circumstances require a long-lived asset be tested for possible impairment, the Company first compares undiscounted cash flows expected to be generated by the asset to its carrying value. If the carrying value of the long-lived asset is not recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent that the carrying value exceeds its fair value. Fair value is determined through various valuation techniques, including discounted cash flow models, quoted market values, and third-party independent appraisals, as considered necessary.
Goodwill	Goodwill—Goodwill represents the excess of the purchase price of an acquired business over the fair value of the underlying net tangible and intangible assets. Goodwill is evaluated for impairment annually in the third quarter of the Company’s fiscal year, and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. Triggering events that may indicate impairment include, but are not limited to, a significant adverse change in customer demand or business climate that could affect the value of goodwill or a significant decrease in expected cash flows.
Intangible Assets	Intangible Assets —Intangible assets consist of identifiable intangible assets, primarily developed technology, resulting from the Company’s acquisitions. Acquired intangible assets are recorded at cost, net of accumulated amortization. Intangible assets are amortized on a straight-line basis over their estimated useful lives.
Stock-Based Compensation	Stock-Based Compensation —The Company estimates the fair value of share-based awards on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods in the statements of operations. The Company recognizes compensation expense for the majority of its awards over the vesting period of the entire award using the straight-line attribution method. These amounts are reduced by an estimated forfeiture rate. The forfeiture rate is estimated based on actual cancellation experience and is applied to all share-based awards. The rate is estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company selected the Black-Scholes option-pricing model as the method for determining the estimated fair value for stock options and shares pursuant to the Company’s 2014 Employee Stock Purchase Plan, or ESPP. The Black-Scholes option-pricing model requires the use of highly subjective and complex assumptions, which determine the fair value of share-based awards, including the option’s expected term and the price volatility of the underlying stock. The Company uses a Monte Carlo simulation model to determine the fair value of its performance stock units, or PSUs, and recognizes expense using the accelerated attribution method over the requisite service period.
Fair Value Measurements	Fair Value Measurements —The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities that are required to be recorded at fair value, the Company considers the principal or most advantageous market in which to transact and the market-based risk. The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a
Concentration of Risk	Concentration of Risk—Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, short-term investments, and trade accounts receivable. The Company invests its excess cash in money market funds, certificates of deposit, commercial paper, U.S. treasury securities, U.S. agency securities, and corporate debt securities with major financial institutions. Management believes that the financial institutions that hold the Company’s investments are financially sound and, accordingly, are subject to minimal credit risk.
Income Taxes	Income Taxes —The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. In addition, deferred tax assets are recorded for the future benefit of utilizing net operating losses and research and development credit carryforwards. Valuation allowances are provided when necessary to reduce deferred tax assets to the amount that is more likely than not to be realized. The Company recognizes interest and penalties related to unrecognized tax benefits within the income tax expense line in the consolidated statement of operations
Net Loss Per Share	Net Loss Per Share—The Company’s basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding for the period. The diluted net loss per share is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, options to purchase common stock, common stock reserved for issuance, restricted stock units, convertible debt, and shares issuable pursuant to the ESPP are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share as their effect is antidilutive
Recently Issued Accounting Pronouncements Not Yet Adopted and Recently Adopted Accounting Pronouncements	Recently Issued Accounting Pronouncements Not Yet Adopted In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40) . This ASU simplifies the accounting for convertible instruments by reducing the number of accounting models for convertible debt instruments and convertible preferred stock. This will result in more convertible debt instruments being accounted for as a single liability instrument and more convertible preferred stock being accounted for as a single equity instrument with no separate accounting for embedded conversion features. The ASU also simplifies the diluted earnings per share (“EPS”) calculation in certain areas. This standard will be effective for the Company in the fiscal year beginning April 1, 2022. The Company is currently evaluating the effect the standard will have on its consolidated financial statements. Recently Adopted Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which amends guidance on reporting credit losses for assets held at amortized cost basis and available-for-sale debt securities. The Company adopted this new standard on April 1, 2020. The adoption of this standard did not have a material impact on its consolidated financial statements. Under the new standard, the Company assesses credit losses on accounts receivable by taking into consideration past collection experience, credit quality of the customer, age of the receivable balance, current economic conditions, and forecasts that affect the collectability of the reported amount. With respect to available-for-sale debt securities, the updated guidance requires that credit losses be presented as an allowance rather than as a write-down. Allowance for credit losses is recorded in other income (expense), net on the consolidated statements of operations, limited by the amount that fair value is less than the amortized cost basis. Non-credit related impairment losses are reported as a separate component on the consolidated statements of comprehensive loss. In January 2017, the FASB issued ASU 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment , which eliminates Step 2 from the goodwill impairment test. The Company adopted this standard on April 1, 2020. The adoption of this standard did not have a material impact on its consolidated financial statements or disclosures. In August 2018, the FASB issued ASU 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which amends ASC 820, Fair Value Measurement. ASU 2018-13 modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. The removed and modified disclosures will be adopted on a retrospective basis and the new disclosures will be adopted on a prospective basis. The Company adopted this standard on April 1, 2020. The adoption of this standard did not have a material impact on its consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740)

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Mar. 31, 2021
Business Combinations [Abstract]
Schedule of Aggregate Purchase Price Allocation	The following table presents the purchase price allocation related to the acquisition (in thousands): Cash consideration paid $ 45,558 Fair value of common shares issued 114,310 Total consideration 159,868 Post-business combination compensation expense (51,943) Total purchase price 107,925 Net assets assumed (4,099) Deferred tax liabilities 115 Developed technology acquired (4,800) Goodwill $ 99,141 The following table presents the purchase price allocation related to the acquisition (in thousands): Cash consideration paid $ 25,119 Fair value of common shares issued 24,535 Total consideration 49,654 Post-business combination compensation expense (12,639) Cash paid to settle unvested stock options (764) Total purchase price 36,251 Net liabilities assumed 259 Deferred tax liabilities 2,289 Deferred tax assets (1,721) Developed technology acquired (10,900) Goodwill $ 26,178

Joint Venture (Tables)

Joint Venture (Tables)	12 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Redeemable Non-Controlling Interest	The following table summarizes the activity in the redeemable non-controlling interest for the period indicated below: March 31, 2021 March 31, 2020 Balance, beginning of period $ 1,669 $ 2,733 Investment by redeemable non-controlling interest — 978 Net loss attributable to redeemable non-controlling interest (1,421) (2,042) Adjustment to redeemable non-controlling interest 3,141 — Balance, end of period $ 3,389 $ 1,669

Revenue from Contract with Cust

Revenue from Contract with Customer (Tables)	12 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Summary of Deferred Revenue	The following table presents the changes to the Company’s deferred revenue (in thousands): March 31, 2021 March 31, 2020 Deferred revenue, beginning of period $ 316,327 $ 271,597 Contributions from contract asset 2,446 (171) Billings 724,143 644,411 Revenue recognized (667,648) (599,510) Deferred revenue, end of period $ 375,268 $ 316,327

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Information about Financial Assets Measured at Fair Value on Recurring Basis	The following tables present information about the Company’s financial assets measured at fair value on a recurring basis as of March 31, 2021 and 2020 based on the three-tier fair value hierarchy (in thousands): Fair Value Measurements as of March 31, 2021 Level 1 Level 2 Level 3 Total Cash and cash equivalents: Money market funds $ 101,626 $ — $ — $ 101,626 Short-term investments: Certificates of deposit — 48,099 — 48,099 Commercial paper — 11,681 — 11,681 Corporate notes and bonds — 39,873 — 39,873 U.S. treasury securities 475,601 — — 475,601 Restricted cash: Money market funds 5,642 — — 5,642 Total $ 582,869 $ 99,653 $ — $ 682,522 Included in cash and cash equivalents $ 101,626 Included in short-term investments $ 575,254 Included in restricted cash $ 5,642 Fair Value Measurements as of March 31, 2020 Level 1 Level 2 Level 3 Total Cash and cash equivalents: Money market funds $ 107,663 $ — $ — $ 107,663 U.S treasury securities 27,938 — — 27,938 U.S. government agencies — 24,999 — 24,999 Short-term investments: Certificates of deposit — 14,986 — 14,986 Commercial paper — 13,334 — 13,334 Corporate notes and bonds — 60,319 — 60,319 U.S. treasury securities 422,333 — — 422,333 U.S. government agencies — 1,602 — 1,602 Restricted cash: Money market funds 5,641 — — 5,641 Total $ 563,575 $ 115,240 $ — $ 678,815 Included in cash and cash equivalents $ 160,600 Included in short-term investments $ 512,574 Included in restricted cash $ 5,641
Schedule of Debt Securities, Available-for-sale	The following table presents our available-for-sale securities as of March 31, 2021 (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Fair Value Short-term investments: Certificates of deposit $ 48,100 $ 18 $ (19) $ 48,099 Commercial paper 11,676 5 — 11,681 Corporate notes and bonds 39,620 261 (8) 39,873 U.S. treasury securities 474,171 1,575 (145) 475,601 Total available-for-sale investments $ 573,567 $ 1,859 $ (172) $ 575,254 The following table presents the Company’s available-for-sale securities as of March 31, 2020 (in thousands): Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash and cash equivalents: U.S. treasury securities $ 27,923 $ 15 $ — $ 27,938 U.S. government agencies 24,995 4 — 24,999 Short-term investments: Certificates of deposit 15,000 20 (34) 14,986 Commercial paper 13,318 16 — 13,334 Corporate notes and bonds 60,211 221 (113) 60,319 U.S. treasury securities 415,889 6,444 — 422,333 U.S. government agencies 1,600 2 — 1,602 Total available-for-sale investments $ 558,936 $ 6,722 $ (147) $ 565,511
Classification of Available-for-Sale Short-Term Investments by Contractual Maturities	The following table classifies the Company’s available-for-sale short-term investments by contractual maturities as of March 31, 2021 and 2020 (in thousands): March 31, 2021 March 31, 2020 Due within one year $ 299,032 $ 320,582 Due after one year and within three years 276,222 191,992 Total $ 575,254 $ 512,574

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Mar. 31, 2021
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net, consisted of the following (in thousands): March 31, 2021 March 31, 2020 Computers, software, and equipment $ 14,270 $ 13,249 Site operation equipment 87,479 102,316 Furniture and fixtures 5,758 4,802 Leasehold improvements 49,751 39,081 Capitalized software development costs 66,451 50,440 Total property and equipment 223,709 209,888 Less: accumulated depreciation and amortization (132,401) (109,594) Total property and equipment, net $ 91,308 $ 100,294

0.5% Convertible Senior Notes_2

0.5% Convertible Senior Notes and Capped Call (Tables)	12 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Summary of Convertible Debt	The net carrying amount of the liability component of the Notes as of March 31, 2021 and 2020 was as follows (in thousands): March 31, 2021 March 31, 2020 Principal $ 500,250 $ 500,250 Unamortized debt discount (46,378) (66,894) Unamortized issuance costs (4,492) (6,312) Net carrying amount $ 449,380 $ 427,044
Summary of Interest Expense	Interest expense related to the Notes is as follows (in thousands): March 31, 2021 March 31, 2020 Amortization of debt discount $ 20,516 $ 19,480 Amortization of issuance costs 1,820 1,627 Contractual interest expense 2,501 2,501 Total interest expense $ 24,837 $ 23,608

Goodwill and Purchased Intang_2

Goodwill and Purchased Intangibles Assets (Tables)	12 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwil	The changes in the carrying amount of goodwill for the twelve months ended March 31, 2021 consist of the following (in thousands): Goodwill as of March 31, 2020 $ 45,112 Goodwill acquired 99,141 Goodwill as of March 31, 2021 $ 144,253
Schedule of Purchased Intangible Assets Subject to Amortization	Purchased intangible assets subject to amortization as of March 31, 2021 consisted of the following (in thousands): Gross Carrying Accumulated Net Carrying Developed technology $ 20,116 $ (7,130) $ 12,986 Purchased intangible assets subject to amortization as of March 31, 2020 consisted of the following (in thousands): Gross Carrying Accumulated Net Carrying Developed technology $ 15,316 $ (1,625) $ 13,691
Schedule of Estimated Future Amortization Expense	Estimated future amortization expense as of March 31, 2021 is as follows (in thousands): Fiscal Years Ending March 31, Estimated Future Amortization Expense 2022 $ 6,219 2023 5,567 2024 1,200 $ 12,986

Other Current Liabilities (Tabl

Other Current Liabilities (Tables)	12 Months Ended
	Mar. 31, 2021
Other Liabilities Disclosure [Abstract]
Summary of Other Current Liabilities	Other current liabilities consisted of the following (in thousands): As of March 31, 2021 2020 Accrued liabilities $ 4,050 $ 4,615 Accrued tax liabilities 1,042 2,940 Other 14,082 5,565 Total other current liabilities $ 19,174 $ 13,120

Leases (Tables)

Leases (Tables)	12 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Schedule of Condensed Consolidated Balance Sheet	The following table presents information about leases on the consolidated balance sheet (in thousands): March 31, 2021 March 31, 2020 Assets Lease right-of-use-assets $ 57,425 $ 57,777 Liabilities Lease liabilities $ 7,886 $ 8,682 Lease liabilities, non-current 59,924 57,394 Total operating lease liabilities $ 67,810 $ 66,076
Schedule of Condensed Consolidated Statement of Operations and Supplemental Cash Flow Information	The following table presents information about leases on its consolidated statement of operations (in thousands): Fiscal Year Ended March 31, 2021 2020 Operating lease expense $ 13,870 $ 14,220 Short-term lease expense 843 1,074 Variable lease expense 2,581 2,682 Rent expense for operating leases, net of sublease income, was $14.5 million for the fiscal year ended March 31, 2019. The following table presents supplemental cash flow information about the Company’s leases (in thousands): Fiscal Year Ended March 31, 2021 2020 Cash paid for amounts included in the measurement of lease liabilities $ 15,666 $ 11,372 Operating lease assets obtained in exchange for new lease liabilities (1) 8,525 (9,211) (1) Includes the impact of new leases as well as remeasurements and modifications to existing leases.
Summary of Operating Lease Maturity Under Topic 842	As of March 31, 2021, remaining maturities of lease liabilities were as follows (in thousands): Fiscal Years Ending March 31, Operating Leases 2022 $ 12,187 2023 14,228 2024 13,318 2025 11,712 2026 11,911 Thereafter 20,913 Total operating lease payments $ 84,269 Less imputed interest (16,459) Total operating lease liabilities $ 67,810

Common Stock and Stockholders_2

Common Stock and Stockholders' Equity (Tables)	12 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Schedule of Shares of Common Stock Reserved for Future Issuance	The Company had reserved shares of common stock for future issuance pursuant to equity plans as follows (in thousands): As of March 31, 2021 2020 Common stock options outstanding 2,718 2,850 RSUs and PSUs outstanding 3,405 3,100 Available for future stock option, RSU, and PSU grants 12,281 11,460 Available for future employee stock purchase plan awards 2,702 2,504 21,106 19,914
Schedule of Stock Option, RSU and PSU, and Time-Based Restricted Stock Activity	The following table summarizes the Company’s stock option, restricted stock unit (“RSU”), and performance unit (“PSU”) award activities for the fiscal year ended March 31, 2021 (in thousands, except exercise price, contractual term and fair value information): Options Outstanding RSUs and PSUs Outstanding Number of Shares Weighted- Weighted-Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Number of Weighted- Weighted- Aggregate Outstanding—April 1, 2020 2,850 $ 44.52 6.4 $ 43,576 3,100 $ 74.20 2.7 $ 143,346 Stock options granted 716 62.50 RSUs and PSUs granted (1) 3,030 64.28 Stock options exercised (462) 14.86 20,641 RSUs and PSUs vested (1,536) 69.67 Stock options canceled/forfeited (386) 70.88 RSUs and PSUs canceled/forfeited (1,189) 70.29 Outstanding - March 31, 2021 2,718 $ 50.55 6.2 $ 48,064 3,405 $ 68.78 2.8 $ 209,343 Options vested and expected to vest - March 31, 2021 2,700 $ 50.46 6.1 $ 48,025 Options vested and exercisable - March 31, 2021 1,780 $ 40.36 4.9 $ 47,426 RSUs and PSUs expected to vest - March 31, 2021 3,216 $ 68.79 $ 197,727 (1) The above table includes 111,965 performance unit awards and does not include any time-based restricted stock issued as consideration for an acquisition which are further detailed in the table below. The following table summarizes the time-based restricted stock issued as consideration for an acquisition during the fiscal years ended March 31, 2021, 2020, and 2019: Fiscal Years Ending March 31, Number of Shares of Time-Based Restricted Stock Granted as Consideration for Acquisitions 2019 152,840 (1) 2020 — 2021 736,469 (2) (1) These shares were issued in connection with the SignifAI acquisition, which included a holdback arrangement with certain employees of SignifAI. These shares are subject to the recipients’ continued service and will be recognized as stock-based compensation expense over the vesting periods, which range from 24 months to 36 months from the closing date of the acquisition. (2) These shares were issued in connection with the Pixie Labs acquisition, which included a holdback arrangement with certain employees of Pixie Labs. These shares are subject to the recipients’ continued service and will be recognized as stock-based compensation expense over the vesting periods, which range from 18 months to 37 months from the closing date of the acquisition.
Schedule of Assumptions Used to Estimate Fair Value of Stock Options Granted and ESPP Shares to be Issued	The assumptions used to estimate the fair value of stock options granted and ESPP shares to be issued during the fiscal years ended March 31, 2021, 2020, and 2019 were as follows: Stock Options: Fiscal Year Ended March 31, 2021 2020 2019 Expected term (years) 6 6 6 Expected volatility 44 - 46% 41 - 42% 41 - 42% Risk-free interest rate 0.34 - 0.76% 1.45 - 3.06% 2.27 - 3.06% Dividend yield — — — ESPP: Fiscal Year Ended March 31, 2021 2020 2019 Expected term (years) 0.5 0.5 0.5 Expected volatility 55 - 76% 33 - 60% 37 - 53% Risk-free interest rate 0.06 - 0.12% 1.56 - 1.86% 2.23 - 2.50% Dividend yield — — —
Schedule of Cost of Revenue, Research and Development, Sales and Marketing and General and Administrative Expenses	Cost of revenue, research and development, sales and marketing, and general and administrative expenses were as follows (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 Cost of revenue $ 5,939 $ 5,303 $ 3,487 Research and development 40,964 31,703 17,634 Sales and marketing 54,695 43,548 23,253 General and administrative 33,545 18,982 11,824 Total stock-based compensation expense $ 135,143 $ 99,536 $ 56,198

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Components of (Loss) Income Before Income Taxes	The components of income (loss) before income taxes were as follows (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 Domestic $ (193,262) $ (93,687) $ (46,838) Foreign 2,931 2,919 5,779 Total $ (190,331) $ (90,768) $ (41,059)
Components of Provision (Benefit) for Income Taxes	The components of the provision for income taxes were as follows (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 Current Provision: Federal $ — $ (1,177) $ (269) State (9) 34 32 Foreign 685 1,632 1,742 Total current provision 676 489 1,505 Deferred Provision: Federal 35 — (568) State (96) — — Foreign (56) (278) (240) Total deferred provision (117) (278) (808) Total income tax provision $ 559 $ 211 $ 697
Schedule of Effective Federal Statutory Rate and Provision for Income Taxes	The items accounting for the difference between income taxes computed at the federal statutory rate and the provision for income taxes consisted of the following: Fiscal Year Ended March 31, 2021 2020 2019 Federal statutory rate 21.0 % 21.0 % 21.0 % Effect of: State taxes, net of federal benefits 3.0 3.0 5.0 Stock-based compensation (1.5) (0.4) 35.2 Research and development credits, net of ASC 740-10 2.4 5.1 8.7 Permanent items (2.4) (4.0) (3.9) Foreign taxes 0.2 0.4 (0.3) Business combination — — 1.4 Intraperiod allocation — 1.5 — Other 0.7 0.7 0.7 Valuation allowance (23.7) (27.5) (69.5) Effective tax rate (0.3) % (0.2) % (1.7) %
Schedule of Deferred Tax Assets and Liabilities	The following table presents the significant components of the Company’s deferred tax assets and liabilities for the periods presented (in thousands): As of March 31, 2021 2020 Deferred tax assets: Accrued expenses $ 3,429 $ 2,400 Depreciation and amortization 3,518 395 Net operating loss and other attribute carryforwards 178,535 139,765 Stock based compensation 14,987 12,353 Research and development credits 25,932 21,101 Lease liability 15,208 14,830 Other 378 451 Gross deferred tax assets 241,987 191,295 Valuation allowance (198,794) (151,281) Total deferred tax assets 43,193 40,014 Deferred tax liabilities: Prepaids (3,949) (2,474) Intangibles (1,923) (1,989) Capitalized research and development (4,405) (2,739) Deferred contract acquisition costs (15,520) (13,499) Convertible debt (3,991) (5,810) Right of use asset (12,748) (12,847) Total deferred tax liabilities (42,536) (39,358) Total net deferred tax assets/(liabilities) $ 657 $ 656
Schedule of Unrecognized Tax Benefits Reconciliation	Balance at March 31, 2018 $ 6,736 Additions based on tax positions taken during the current period 1,566 Reductions based on tax positions taken during the prior period (305) Balance at March 31, 2019 7,997 Additions based on tax positions taken during the current period 2,183 Additions based on tax positions taken during the prior period 687 Reductions based on tax positions taken during the prior period (529) Balance at March 31, 2020 10,338 Additions based on tax positions taken during the current period 2,667 Additions based on tax positions taken during the prior period 703 Reductions based on tax positions taken during the prior period (1,549) Balance at March 31, 2021 $ 12,159

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	12 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Computation of Net Loss Per Share Attributable to Common Stockholders, Basic and Diluted	The following table sets forth the computation of net loss per share, basic and diluted (in thousands, except per share amounts): Fiscal Year Ended March 31, 2021 2020 2019 Numerator: Net loss attributable to New Relic $ (192,610) $ (88,937) $ (40,893) Denominator: Weighted average shares used to compute net loss per share, basic and diluted 61,070 58,601 56,884 Net loss attributable to New Relic per share—basic and diluted $ (3.15) $ (1.52) $ (0.72)
Antidilutive Securities Excluded from Computation of Diluted Net Loss per Common Share of Common Stock Equivalents	The following outstanding options, unvested shares, and ESPP shares were excluded (as common stock equivalents) from the computation of diluted net loss per common share for the periods presented as their effect would have been antidilutive (in thousands): As of March 31, 2021 2020 2019 Options to purchase common stock 2,718 2,850 2,751 RSUs and PSUs 3,405 3,100 2,419 ESPP shares 48 69 29 6,171 6,019 5,199

Revenue by Geographic Location

Revenue by Geographic Location (Tables)	12 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Areas	The following table shows the Company’s revenue by geographic areas, as determined based on the billing address of its customers (in thousands): Fiscal Year Ended March 31, 2021 2020 2019 United States $ 460,944 $ 417,827 $ 327,341 EMEA 104,184 98,651 87,596 APAC 62,590 50,831 38,466 Other 39,930 32,201 25,822 Total revenue $ 667,648 $ 599,510 $ 479,225

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	May 31, 2018
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Gross value of capitalized internal use software	$ 17.6	$ 8.1	$ 6
Stock-based compensation costs	4.1	1.5	0.8
Amortization expense	7	4.9	4.1
Net book value of capitalized software	23.2	13.5
Capitalized implementation costs	2.1	2.5
Amortization expense	1.2	0.2
Sales and marketing
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Advertising expense	$ 24.5	$ 21.8	$ 19.3
Computers and Software
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment estimated useful life	3 years
Other Office Equipment and Site-related Computer Hardware
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment estimated useful life	3 years
Furniture and Fixtures
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment estimated useful life	5 years
Capitalized Software Development Costs
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment estimated useful life	3 years
Convertible Senior Notes Due 2023 | Convertible Debt
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Stated interest rate	0.50%			0.50%

Business Combination - Narrativ

Business Combination - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 22, 2020	Oct. 31, 2019	Jan. 25, 2019	Oct. 09, 2018	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition [Line Items]
Preliminary purchase price allocation, goodwill					$ 144,253	$ 45,112
Stock-based compensation expense					135,143	$ 99,536	$ 56,198
Pixie Labs Inc.
Business Acquisition [Line Items]
Business acquisition, aggregate purchase price	$ 107,925
Cash consideration paid	45,558
Cash held in escrow	$ 15,000
Escrow period	12 months
Number of shares issued to acquire capital stock (in shares)	884,269
Fair value of common shares issued	$ 62,400
Fair value of shares issued to acquire capital stock (in usd per share)	$ 70.53
Total direct transaction costs					$ 900
Acquisition-related expenses	$ 600
Holdback arrangement, common stock (in shares)	736,469
Amount excluded from the aggregate purchase price	$ 51,900
Preliminary purchase price allocation, goodwill	$ 99,141
Pixie Labs Inc. | Minimum
Business Acquisition [Line Items]
Vesting period	18 months
Pixie Labs Inc. | Maximum
Business Acquisition [Line Items]
Vesting period	37 months
Pixie Labs Inc. | Technology
Business Acquisition [Line Items]
Acquired technology, estimated useful life	3 years
IOpipe, Inc.
Business Acquisition [Line Items]
Cash consideration paid		$ 5,100
Amount excluded from the aggregate purchase price		900
Preliminary purchase price allocation, goodwill		3,600
IOpipe, Inc. | Technology
Business Acquisition [Line Items]
Acquired technology, estimated useful life				3 years
Acquired technology		$ 1,500
SignifAI, Inc.
Business Acquisition [Line Items]
Business acquisition, aggregate purchase price			$ 36,251
Cash consideration paid			$ 25,119
Number of shares issued to acquire capital stock (in shares)			143,861
Fair value of shares issued to acquire capital stock (in usd per share)			$ 82.69
Amount excluded from the aggregate purchase price			$ 12,600
Preliminary purchase price allocation, goodwill			26,178
Aggregate fair value of common stock			11,900
Stock-based compensation expense			$ 800
Holdback arrangement, common stock (in shares)			152,840
SignifAI, Inc. | Minimum
Business Acquisition [Line Items]
Vesting period			24 months
SignifAI, Inc. | Maximum
Business Acquisition [Line Items]
Vesting period			36 months
CoScale NV
Business Acquisition [Line Items]
Cash consideration paid				$ 6,300
Amount excluded from the aggregate purchase price				900
Preliminary purchase price allocation, goodwill				3,400
CoScale NV | Technology
Business Acquisition [Line Items]
Acquired technology				$ 2,900

Business Combination - Schedule

Business Combination - Schedule of Aggregate Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 22, 2020	Jan. 25, 2019	Mar. 31, 2021	Mar. 31, 2020
Business Acquisition [Line Items]
Goodwill			$ 144,253	$ 45,112
Pixie Labs Inc.
Business Acquisition [Line Items]
Cash consideration paid	$ 45,558
Fair value of common shares issued	114,310
Total consideration	159,868
Post-business combination compensation expense	(51,943)
Total purchase price	107,925
Net liabilities assumed	(4,099)
Deferred tax liabilities	115
Developed technology acquired	(4,800)
Goodwill	$ 99,141
SignifAI, Inc.
Business Acquisition [Line Items]
Cash consideration paid		$ 25,119
Fair value of common shares issued		24,535
Total consideration		49,654
Post-business combination compensation expense		(12,639)
Cash paid to settle unvested stock options		(764)
Total purchase price		36,251
Net liabilities assumed		(259)
Deferred tax liabilities		2,289
Deferred tax assets		(1,721)
Developed technology acquired		(10,900)
Goodwill		$ 26,178

Joint Venture - Additional Info

Joint Venture - Additional Information (Details) ¥ in Millions	Aug. 21, 2019USD ($)	Aug. 21, 2019JPY (¥)	Aug. 21, 2018USD ($)	Aug. 21, 2018JPY (¥)	Mar. 31, 2021USD ($)	Aug. 21, 2019JPY (¥)
Schedule of Equity Method Investments [Line Items]
Additional investor contribution	$ 1,500,000					¥ 156
Redemption value of redeemable non-controlling interest					$ 3,100,000
The Investors
Schedule of Equity Method Investments [Line Items]
Contributions for joint venture	$ 1,000,000	¥ 104	$ 3,600,000	¥ 396
New Relic K.K | The Investors
Schedule of Equity Method Investments [Line Items]
Ownership percentage, noncontrolling interest			40.00%	40.00%	60.00%

Joint Venture - Schedule of Red

Joint Venture - Schedule of Redeemable Non-Controlling Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning of period	$ 1,669	$ 2,733
Investment by redeemable non-controlling interest	0	978
Net loss attributable to redeemable non-controlling interest	(1,421)	(2,042)
Adjustment to redeemable non-controlling interest	3,141	0
Balance, end of period	$ 3,389	$ 1,669

Revenue - Additional Informatio

Revenue - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract assets	$ 2.5	$ 0.1
Percentage of revenue recognized	47.00%	44.00%
Recognition of capitalized contract costs, due to adoption of new accounting guidance	$ 68.8	$ 60.2
Capitalized contract cost, amortization	38.3	32.7
Acquisition costs expensed as incurred	$ 14.5	$ 13.3

Revenue - Summary of Deferred R

Revenue - Summary of Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Contract With Customer, Contract Liability Rollforward [Roll Forward]
Deferred revenue, beginning of period	$ 316,327	$ 271,597
Contributions from contract asset	2,446	(171)
Billings	724,143	644,411
Revenue recognized	(667,648)	(599,510)
Deferred revenue, end of period	$ 375,268	$ 316,327

Revenue - Remaining Performance

Revenue - Remaining Performance Obligations (Details) $ in Millions	Mar. 31, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation	$ 726.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	91.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	24 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	8.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period

Fair Value Measurements - Infor

Fair Value Measurements - Information about Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	$ 682,522	$ 678,815
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	582,869	563,575
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	99,653	115,240
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Cash and cash equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	101,626	160,600
Cash and cash equivalents | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	101,626	107,663
Cash and cash equivalents | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		27,938
Cash and cash equivalents | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		24,999
Cash and cash equivalents | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	101,626	107,663
Cash and cash equivalents | Level 1 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		27,938
Cash and cash equivalents | Level 1 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		0
Cash and cash equivalents | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Cash and cash equivalents | Level 2 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		0
Cash and cash equivalents | Level 2 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		24,999
Cash and cash equivalents | Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Cash and cash equivalents | Level 3 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		0
Cash and cash equivalents | Level 3 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		0
Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	575,254	512,574
Short-term investments | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	48,099	14,986
Short-term investments | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	11,681	13,334
Short-term investments | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	39,873	60,319
Short-term investments | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	475,601	422,333
Short-term investments | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		1,602
Short-term investments | Level 1 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 1 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 1 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 1 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	475,601	422,333
Short-term investments | Level 1 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		0
Short-term investments | Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	48,099	14,986
Short-term investments | Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	11,681	13,334
Short-term investments | Level 2 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	39,873	60,319
Short-term investments | Level 2 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 2 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		1,602
Short-term investments | Level 3 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 3 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 3 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 3 | U.S. treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Short-term investments | Level 3 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value		0
Restricted cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	5,642	5,641
Restricted cash | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	5,642	5,641
Restricted cash | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	5,642	5,641
Restricted cash | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	0	0
Restricted cash | Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value	$ 0	$ 0

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Debt Securities Available-for-sale (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 573,567	$ 558,936
Unrealized Gains	1,859	6,722
Unrealized Losses	(172)	(147)
Fair Value	575,254	565,511
Certificates of deposit | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	48,100	15,000
Unrealized Gains	18	20
Unrealized Losses	(19)	(34)
Fair Value	48,099	14,986
Commercial paper | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,676	13,318
Unrealized Gains	5	16
Unrealized Losses	0	0
Fair Value	11,681	13,334
Corporate notes and bonds | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	39,620	60,211
Unrealized Gains	261	221
Unrealized Losses	(8)	(113)
Fair Value	39,873	60,319
U.S. treasury securities | Cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		27,923
Unrealized Gains		15
Unrealized Losses		0
Fair Value		27,938
U.S. treasury securities | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	474,171	415,889
Unrealized Gains	1,575	6,444
Unrealized Losses	(145)	0
Fair Value	$ 475,601	422,333
U.S. government agencies | Cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		24,995
Unrealized Gains		4
Unrealized Losses		0
Fair Value		24,999
U.S. government agencies | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		1,600
Unrealized Gains		2
Unrealized Losses		0
Fair Value		$ 1,602

Fair Value Measurements - Class

Fair Value Measurements - Classification of Available-for-Sale Short-Term Investments by Contractual Maturities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Due within one year	$ 299,032	$ 320,582
Due after one year and within three years	276,222	191,992
Total	$ 575,254	$ 512,574

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - Convertible Senior Notes Due 2023 - Convertible Debt - USD ($) $ in Millions	Mar. 31, 2021	May 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate	0.50%	0.50%
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of Notes	$ 442.9

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 223,709	$ 209,888
Less: accumulated depreciation and amortization	(132,401)	(109,594)
Total property and equipment, net	91,308	100,294
Computers, software, and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	14,270	13,249
Site operation equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	87,479	102,316
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	5,758	4,802
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	49,751	39,081
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 66,451	$ 50,440

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 44.3	$ 41.1	$ 25.9

0.5% Convertible Senior Notes_3

0.5% Convertible Senior Notes and Capped Call - Additional Information (Details) $ / shares in Units, shares in Millions	1 Months Ended	12 Months Ended
	May 31, 2018USD ($)day$ / sharesshares	Mar. 31, 2019USD ($)	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)
Debt Instrument [Line Items]
Purchase of capped calls	$ 63,200,000	$ 63,182,000
Capped Calls
Debt Instrument [Line Items]
Convertible debt, conversion price (in dollars per share) | $ / shares	$ 110.81
Initial cap price (in dollars per share) | $ / shares	$ 173.82
Number of shares covered by cap call (in shares) | shares	4.5
Additional Paid-In Capital
Debt Instrument [Line Items]
Purchase of capped calls		$ 63,182,000
Additional Paid-In Capital | Capped Calls
Debt Instrument [Line Items]
Cost incurred related to capped calls	$ 63,200,000
Convertible Debt | Convertible Senior Notes Due 2023
Debt Instrument [Line Items]
Debt instrument face amount	$ 500,250,000
Stated interest rate	0.50%		0.50%
Convertible debt, conversion ratio	9.02
Convertible debt, conversion price (in dollars per share) | $ / shares	$ 110.81
Debt discount for Conversion Option	$ 102,500,000
Effective interest rate	5.74%
Issuance costs	$ 11,600,000		$ 4,492,000	$ 6,312,000
Debt issuance costs, equity component	9,200,000
Issuance costs attributable to the equity component	2,400,000
Convertible Debt | Convertible Senior Notes Due 2023, Over-Allotment Option
Debt Instrument [Line Items]
Debt instrument face amount	$ 65,250,000
Convertible Debt | Stock Price Trigger Measurement
Debt Instrument [Line Items]
Threshold trading days | day	20
Threshold consecutive trading days | day	30
Threshold percentage of stock price trigger (less than)	130.00%
Convertible Debt | Notes Price Trigger Measurement
Debt Instrument [Line Items]
Threshold trading days | day	5
Threshold consecutive trading days | day	5
Threshold percentage of stock price trigger (less than)	98.00%

0.5% Convertible Senior Notes_4

0.5% Convertible Senior Notes and Capped Call - Schedule of Liability Component of Convertible Debt (Details) - Convertible Debt - Convertible Senior Notes Due 2023 - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020	May 31, 2018
Debt Instrument [Line Items]
Principal	$ 500,250	$ 500,250
Unamortized debt discount	(46,378)	(66,894)
Unamortized issuance costs	(4,492)	(6,312)	$ (11,600)
Net carrying amount	$ 449,380	$ 427,044

0.5% Convertible Senior Notes_5

0.5% Convertible Senior Notes and Capped Call - Schedule of Interest Expense (Details) - Convertible Debt - Convertible Senior Notes Due 2023 - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Amortization of debt discount	$ 20,516	$ 19,480
Amortization of issuance costs	1,820	1,627
Contractual interest expense	2,501	2,501
Total interest expense	$ 24,837	$ 23,608

Goodwill and Purchased Intang_3

Goodwill and Purchased Intangibles Assets - Schedule of Goodwill (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2021USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill as of March 31, 2020	$ 45,112
Goodwill acquired	99,141
Goodwill as of March 31, 2021	$ 144,253

Goodwill and Purchased Intang_4

Goodwill and Purchased Intangibles Assets - Schedule of Purchased Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 12,986	$ 13,691
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,116	15,316
Accumulated Amortization	(7,130)	(1,625)
Net Carrying Amount	$ 12,986	$ 13,691

Goodwill and Purchased Intang_5

Goodwill and Purchased Intangibles Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 5.5	$ 1.7	$ 1.3

Goodwill and Purchased Intang_6

Goodwill and Purchased Intangibles Assets - Schedule of Estimated Future Amortization Expense (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Estimated Future Amortization Expense
2022	$ 6,219
2023	5,567
2024	1,200
Net Carrying Amount	$ 12,986	$ 13,691

Other Current Liabilities (Deta

Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Other Liabilities Disclosure [Abstract]
Accrued liabilities	$ 4,050	$ 4,615
Accrued tax liabilities	1,042	2,940
Other	14,082	5,565
Total other current liabilities	$ 19,174	$ 13,120

Leases - Assets and Liabilities

Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Assets
Lease right-of-use-assets	$ 57,425	$ 57,777
Liabilities
Lease liabilities	7,886	8,682
Lease liabilities, non-current	59,924	57,394
Total operating lease liabilities	$ 67,810	$ 66,076

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2021
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term		6 years 2 months 12 days
Weighted average discount rate		6.90%
Rent expense	$ 14.5

Leases - Expense (Details)

Leases - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease expense	$ 13,870	$ 14,220
Short-term lease expense	843	1,074
Variable lease expense	$ 2,581	$ 2,682

Leases - Cash Flow Information

Leases - Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 15,666	$ 11,372
Operating lease assets obtained in exchange for new lease liabilities	$ 8,525	$ (9,211)

Leases - Operating Lease Maturi

Leases - Operating Lease Maturity Schedule (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
2022	$ 12,187
2023	14,228
2024	13,318
2025	11,712
2026	11,911
Thereafter	20,913
Total operating lease payments	84,269
Less imputed interest	(16,459)
Total operating lease liabilities	$ 67,810	$ 66,076

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Sep. 30, 2020	Mar. 31, 2021	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Purchase commitments		$ 494.6	$ 64.7
Minimum commitment period	5 years
Minimum commitment amount	$ 500

Common Stock and Stockholders_3

Common Stock and Stockholders' Equity - Schedule of Shares of Common Stock Reserved for Future Issuance (Detail) - shares shares in Thousands	Mar. 31, 2021	Mar. 31, 2020
Class of Stock [Line Items]
Shares of common stock reserved for future issuance (in shares)	21,106	19,914
RSUs and PSUs outstanding
Class of Stock [Line Items]
Shares of common stock reserved for future issuance (in shares)	3,405	3,100
Available for future stock option, RSU, and PSU grants
Class of Stock [Line Items]
Shares of common stock reserved for future issuance (in shares)	12,281	11,460
Available for future employee stock purchase plan awards
Class of Stock [Line Items]
Shares of common stock reserved for future issuance (in shares)	2,702	2,504
Common stock options outstanding
Class of Stock [Line Items]
Shares of common stock reserved for future issuance (in shares)	2,718	2,850

Common Stock and Stockholders_4

Common Stock and Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2014	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Class of Stock [Line Items]
Stock-based compensation expense		$ 135,143	$ 99,536	$ 56,198
Shares available for issuance (in shares)		21,106,000	19,914,000
Weighted-average grant-date fair value of options granted (in usd per share)		$ 26.51	$ 30.67	$ 42.37
Intrinsic value of options exercised		$ 20,641
Total fair value of RSUs vested		$ 107,100	$ 63,300	$ 38,200
Closing stock price reported (in usd per share)		$ 61.48
Unrecognized stock-based compensation cost related to outstanding unvested stock awards		$ 25,400
Stock-based compensation cost expected to be recognized over weighted-average period		2 years 7 months 6 days
Expected to vest unrecognized stock-based compensation cost related to outstanding unvested stock options		$ 249,800
Stock-based compensation cost expected to be recognized over weighted-average period		6 years 1 month 6 days
Unvested Stock Options
Class of Stock [Line Items]
Stock-based compensation cost expected to be recognized over weighted-average period		2 years 9 months 18 days
Performance Shares
Class of Stock [Line Items]
Intrinsic value of options exercised		$ 20,600	$ 23,800	$ 62,500
Expected to vest unrecognized stock-based compensation cost related to outstanding unvested stock options		$ 4,900
Stock-based compensation cost expected to be recognized over weighted-average period		2 years
Performance Units (PSUs) | Minimum
Class of Stock [Line Items]
Vesting percentage		0.00%
Performance Units (PSUs) | Maximum
Class of Stock [Line Items]
Vesting percentage		200.00%
Performance Units (PSUs) | Share-based Payment Arrangement, Tranche One
Class of Stock [Line Items]
Vesting period		1 year
Performance Units (PSUs) | Share-based Payment Arrangement, Tranche Two
Class of Stock [Line Items]
Vesting period		2 years
Performance Units (PSUs) | Share-based Payment Arrangement, Tranche Three
Class of Stock [Line Items]
Vesting period		3 years
ESPP shares
Class of Stock [Line Items]
Shares reserved for issuance under plan (in shares)	1,000,000
Additional shares available for issuance under the plan (in shares)	500,000
Percentage of common stock shares increased under the plan	1.00%
Common stock purchased under Employee Stock Purchase Plan (in shares)		300,000	300,000	200,000
Stock-based compensation expense		$ 5,500	$ 5,300	$ 3,600
Shares available for issuance (in shares)		2,701,577
2008 Equity Incentive Plan
Class of Stock [Line Items]
Shares available for issuance (in shares)		0
2014 Equity Incentive Plan
Class of Stock [Line Items]
Shares reserved for issuance under plan (in shares)	5,000,000
Shares available for issuance (in shares)		12,280,588
Shares available for grant under plan (in shares)	5,184,878
Percentage of shares of company's common stock outstanding for increase in shares reserved for issuance under stock plan	5.00%

Common Stock and Stockholders_5

Common Stock and Stockholders' Equity - Schedule of Stock Option, RSU and PSU Activities (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Number of Shares
Beginning balance (in shares)	2,850,000
Stock options granted (in shares)	716,000
Stock options exercised (in shares)	(462,000)
Stock options canceled/forfeited (in shares)	(386,000)
Ending balance (in shares)	2,718,000	2,850,000
Options vested and expected to vest (in shares)	2,700,000
Options vested and exercisable (in shares)	1,780,000
Weighted- Average Exercise Price
Beginning balance (in usd per share)	$ 44.52
Stock options granted (in usd per share)	62.50
Stock options exercised (in usd per share)	14.86
Stock options canceled/forfeited (in usd per share)	70.88
Ending balance (in usd per share)	50.55	$ 44.52
Options vested and expected to vest (in usd per share)	50.46
Options vested and exercisable (in usd per share)	$ 40.36
Weighted-Average Remaining Contractual Term (in years)
Balance	6 years 2 months 12 days	6 years 4 months 24 days
Options vested and expected to vest	6 years 1 month 6 days
Options vested and exercisable	4 years 10 months 24 days
Aggregate Intrinsic Value
Beginning balance	$ 43,576
Options vested and expected to vest	48,025
Stock options exercised	20,641
Ending balance	48,064	$ 43,576
Options vested and exercisable	$ 47,426
Number of Shares
Beginning balance (in shares)	3,100,000
RSUs granted (in shares)	3,030,000
RSUs vested (in shares)	(1,536,000)
RSUs canceled/forfeited (in shares)	(1,189,000)
Ending balance (in shares)	3,405,000	3,100,000
RSUs expected to vest (in shares)	3,216,000
Weighted- Average Grant Date Fair Value
Beginning balance (in usd per share)	$ 74.20
RSUs granted (in usd per share)	64.28
RSUs vested (in usd per share)	69.67
RSUs canceled/forfeited (in usd per share)	70.29
Ending balance (in usd per share)	68.78	$ 74.20
RSUs expected to vest (in usd per share)	$ 68.79
Weighted- Average Remaining Contractual Term (in years)
Balance	2 years 9 months 18 days	2 years 8 months 12 days
Aggregate Intrinsic Value
Beginning balance	$ 143,346
Ending balance	209,343	$ 143,346
RSUs expected to vest	$ 197,727
Performance Unit Award
Number of Shares
RSUs granted (in shares)	111,965

Common Stock and Stockholders_6

Common Stock and Stockholders' Equity - Schedule of Time-Based Restricted Stock Activity (Details) - shares	Dec. 22, 2020	Jan. 25, 2019	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares of Time-Based Restricted Stock Granted as Consideration for Acquisitions (in shares)			3,030,000
Time-Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares of Time-Based Restricted Stock Granted as Consideration for Acquisitions (in shares)			736,469	0	152,840
Time-Based Restricted Stock | SignifAI, Inc. | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		24 months
Time-Based Restricted Stock | SignifAI, Inc. | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		36 months
Time-Based Restricted Stock | Pixie Labs Inc. | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	18 months
Time-Based Restricted Stock | Pixie Labs Inc. | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	37 months

Common Stock and Stockholders_7

Common Stock and Stockholders' Equity - Schedule of Assumptions Used to Estimate Fair Value of Stock Options Granted and ESPP Shares to be Issued (Detail)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 months	6 months	6 months
Dividend yield	0.00%	0.00%	0.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 years	6 years	6 years
Dividend yield	0.00%	0.00%	0.00%
Minimum | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	55.00%	33.00%	37.00%
Risk-free interest rate	0.06%	1.56%	2.23%
Minimum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	44.00%	41.00%	41.00%
Risk-free interest rate	0.34%	1.45%	2.27%
Maximum | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	76.00%	60.00%	53.00%
Risk-free interest rate	0.12%	1.86%	2.50%
Maximum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	46.00%	42.00%	42.00%
Risk-free interest rate	0.76%	3.06%	3.06%

Common Stock and Stockholders_8

Common Stock and Stockholders' Equity - Schedule of Cost of Revenue, Research and Development, Sales and Marketing and General and Administrative Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 135,143	$ 99,536	$ 56,198
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	5,939	5,303	3,487
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	40,964	31,703	17,634
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	54,695	43,548	23,253
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 33,545	$ 18,982	$ 11,824

Income Taxes - Components of (L

Income Taxes - Components of (Loss) Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (193,262)	$ (93,687)	$ (46,838)
Foreign	2,931	2,919	5,779
Total	$ (190,331)	$ (90,768)	$ (41,059)

Income Taxes - Components of Pr

Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Current Provision:
Federal	$ 0	$ (1,177)	$ (269)
State	(9)	34	32
Foreign	685	1,632	1,742
Total current provision	676	489	1,505
Deferred Provision:
Federal	35	0	(568)
State	(96)	0	0
Foreign	(56)	(278)	(240)
Total deferred provision	(117)	(278)	(808)
Total income tax provision	$ 559	$ 211	$ 697

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Federal Statutory Rate and Provision for Income Taxes (Detail)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	21.00%	21.00%
Effect of:
State taxes, net of federal benefits	3.00%	3.00%	5.00%
Stock-based compensation	(1.50%)	(0.40%)	35.20%
Research and development credits, net of ASC 740-10	2.40%	5.10%	8.70%
Permanent items	(2.40%)	(4.00%)	(3.90%)
Foreign taxes	0.20%	0.40%	(0.30%)
Business combination	0.00%	0.00%	1.40%
Intraperiod allocation	0.00%	1.50%	0.00%
Other	0.70%	0.70%	0.70%
Valuation allowance	(23.70%)	(27.50%)	(69.50%)
Effective tax rate	(0.30%)	(0.20%)	(1.70%)

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets:
Accrued expenses	$ 3,429	$ 2,400
Depreciation and amortization	3,518	395
Net operating loss and other attribute carryforwards	178,535	139,765
Stock based compensation	14,987	12,353
Research and development credits	25,932	21,101
Lease liability	15,208	14,830
Other	378	451
Gross deferred tax assets	241,987	191,295
Valuation allowance	(198,794)	(151,281)
Total deferred tax assets	43,193	40,014
Deferred tax liabilities:
Prepaids	(3,949)	(2,474)
Intangibles	(1,923)	(1,989)
Capitalized research and development	(4,405)	(2,739)
Deferred contract acquisition costs	(15,520)	(13,499)
Convertible debt	(3,991)	(5,810)
Right of use asset	(12,748)	(12,847)
Total deferred tax liabilities	(42,536)	(39,358)
Total net deferred tax assets/(liabilities)	$ 657	$ 656

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Tax Contingency [Line Items]
Valuation allowance for company	$ 47,500,000	$ 24,500,000
U.S. Federal net operating losses	707,800,000
State net operating losses	389,000,000
U.S. Federal net operating losses, amount limited to 80% of taxable income, carried forward indefinitely	$ 286,600,000
U.S. Federal net operating losses, taxable income threshold	80.00%
U.S. Federal net operating losses, amount subject to expiration in 2028	$ 421,200,000
Minimum percentage of ownership required to increase in stock of the ownership	5.00%
Increase in ownership percentage of certain stockholders	5000.00%
Unrecognized tax benefits	$ 12,159,000	10,338,000	$ 7,997,000	$ 6,736,000
Unrecognized tax benefits that would affect income tax expense	11,800,000
Accrued interest and penalties related to uncertain tax positions	0	$ 0	$ 0
U.S. | Research and Development
Income Tax Contingency [Line Items]
Research and development credits	28,600,000
California | Research and Development
Income Tax Contingency [Line Items]
Research and development credits	5,200,000
Oregon | Research and Development
Income Tax Contingency [Line Items]
Research and development credits	$ 2,000,000

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 10,338	$ 7,997	$ 6,736
Additions based on tax positions taken during the current period	2,667	2,183	1,566
Additions based on tax positions taken during the prior period	703	687
Reductions based on tax positions taken during the prior period	(1,549)	(529)	(305)
Unrecognized tax benefits, ending balance	$ 12,159	$ 10,338	$ 7,997

Net Loss Per Share - Additional

Net Loss Per Share - Additional Information (Details) - shares shares in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per common share (in shares)	6,171	6,019	5,199
Convertible Debt Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per common share (in shares)	4,500

Net Loss Per Share - Computatio

Net Loss Per Share - Computation of Net Loss Per Share Attributable to Common Stockholders, Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss attributable to New Relic	$ (192,610)	$ (88,937)	$ (40,893)
Denominator:
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	61,070	58,601	56,884
Net loss per share, basic and diluted (in usd per share)	$ (3.15)	$ (1.52)	$ (0.72)

Net Loss Per Share - Antidiluti

Net Loss Per Share - Antidilutive Securities Excluded from Computation of Diluted Net Loss per Common Share of Common Stock Equivalents (Detail) - shares shares in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per common share (in shares)	6,171	6,019	5,199
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per common share (in shares)	48	69	29
RSUs and PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per common share (in shares)	3,405	3,100	2,419
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net loss per common share (in shares)	2,718	2,850	2,751

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Postemployment Benefits [Abstract]
Contributions to employee benefit plan	$ 8.3	$ 7.7	$ 6.3

Revenue by Geographic Locatio_2

Revenue by Geographic Location - Schedule of Revenue by Geographic Areas (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 667,648	$ 599,510	$ 479,225
United States
Segment Reporting Information [Line Items]
Total revenue	460,944	417,827	327,341
EMEA
Segment Reporting Information [Line Items]
Total revenue	104,184	98,651	87,596
APAC
Segment Reporting Information [Line Items]
Total revenue	62,590	50,831	38,466
Other
Segment Reporting Information [Line Items]
Total revenue	$ 39,930	$ 32,201	$ 25,822

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Related Party Transactions [Abstract]
Revenue from sales to related parties	$ 1.7	$ 1	$ 0.2
Expenses related to purchases from related parties	0	1.4	$ 1.3
Accounts payable to related parties	$ 0	$ 0.1

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event $ in Millions	Apr. 06, 2021USD ($)
Minimum
Subsequent Event [Line Items]
Employee terminations and other costs	$ 13
Maximum
Subsequent Event [Line Items]
Employee terminations and other costs	$ 16