Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss attributable to New Relic	$ (13,951,000)	$ (30,625,000)
Net loss attributable to redeemable non-controlling interest (Note 2)	(197,000)	0
Net loss:	(14,148,000)	(30,625,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	24,823,000	11,553,000
Stock-based compensation expense	24,860,000	19,845,000
Amortization of debt discount and issuance costs	7,292,000	0
Other	588,000	384,000
Changes in operating assets and liabilities:
Accounts receivable	23,345,000	22,522,000
Prepaid expenses and other assets	724,000	(5,450,000)
Deferred contract acquisition costs	(17,415,000)	0
Accounts payable	1,960,000	(530,000)
Accrued compensation and benefits and other liabilities	4,570,000	2,786,000
Deferred revenue	639,000	(3,453,000)
Deferred rent	976,000	(431,000)
Net cash provided by operating activities	58,214,000	16,601,000
Cash flows from investing activities:
Purchases of property and equipment	(14,255,000)	(14,394,000)
Purchases of short-term investments	(496,229,000)	(55,126,000)
Proceeds from sale and maturity of short-term investments	76,683,000	56,432,000
Capitalized software development costs	(3,062,000)	(1,486,000)
Net cash used in investing activities	(436,863,000)	(14,574,000)
Cash flows from financing activities:
Investment from redeemable non-controlling interest	3,596,000	0
Proceeds from issuance of convertible senior notes, net of issuance costs paid of $11,582	488,669,000	0
Purchase of capped call related to convertible senior notes	(63,182,000)	0
Proceeds from employee stock purchase plan	4,887,000	3,029,000
Proceeds from exercise of employee stock options	8,998,000	17,264,000
Net cash provided by financing activities	442,968,000	20,293,000
Net increase in cash, cash equivalents and restricted cash	64,319,000	22,320,000
Cash, cash equivalents and restricted cash at beginning of period	140,681,000	96,420,000
Cash, cash equivalents and restricted cash at end of period	205,000,000	118,740,000
Supplemental disclosure of cash flow information:
Cash paid for interest and income taxes	457,000	193,000
Noncash investing and financing activities:
Property and equipment purchased but not yet paid	$ 6,878,000	$ 1,042,000