CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities
Net loss	$ (53,967)	$ (33,240)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,864	2,298
Stock-based compensation	30,567	14,009
Amortization of debt discount and issuance costs	12,023	3,221
Amortization of finance right-of-use assets	994	994
Amortization of operating right-of-use assets	1,372	220
Non-cash interest on finance lease liabilities	0	905
Deferred income taxes	(290)	(557)
Accretion of discount on short-term investments	(193)	(1,509)
Change in operating assets and liabilities:
Accounts receivable	3,637	10,960
Prepaid expenses and other current assets	234	(260)
Deferred commissions	(3,063)	(2,987)
Other long-term assets	(170)	32
Accounts payable	219	(268)
Accrued liabilities	(2,779)	3,324
Operating lease liabilities	(1,126)	(195)
Deferred revenue	3,349	6,267
Other liabilities, non-current	451	0
Net cash provided by (used in) operating activities	(5,878)	3,214
Cash flows from investing activities
Purchases of property and equipment	(1,505)	(389)
Proceeds from maturities of marketable securities	165,000	140,000
Purchases of marketable securities	(160,283)	(139,024)
Net cash provided by investing activities	3,212	587
Cash flows from financing activities
Payments of issuance costs for convertible senior notes	(4,154)	0
Proceeds from exercise of stock options, including early exercised stock options	3,000	6,437
Repurchase of early exercised stock options	(1)	(30)
Principal repayments of finance leases	(1,135)	0
Net cash provided by (used in) financing activities	(2,290)	6,407
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(593)	19
Net increase (decrease) in cash, cash equivalents and restricted cash	(5,549)	10,227
Cash, cash equivalents and restricted cash, beginning of period	706,706	148,347
Cash, cash equivalents and restricted cash, end of period	701,157	158,574
Cash paid during the period for:
Income taxes, net of refunds	553	735
Interest expense	884	0
Reconciliation of cash, cash equivalents and restricted cash within the condensed consolidated balance sheets, end of period, to the amounts shown in the statements of cash flows above
Total cash, cash equivalents and restricted cash	$ 701,157	$ 158,574

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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