CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ 27,075	$ 2,214
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	28,777	6,662
Amortization of deferred contract acquisition costs	16,287	7,419
Depreciation and amortization	5,339	3,324
Provision for accounts receivable allowances	3,868	828
Non-cash operating lease cost	2,248	1,533
Charitable donation of common stock	1,000	0
Remeasurement gain on equity investment	2,538	0
Other	1,117	257
Changes in operating assets and liabilities:
Accounts receivable	(142,501)	(16,103)
Prepaid expenses and other assets	(49,080)	(8,617)
Deferred contract acquisition costs	(124,854)	(14,434)
Accounts payable	1,756	4,373
Accrued expenses and other liabilities	167,322	12,223
Deferred revenue	322,862	23,557
Operating lease liabilities, net	287	(1,000)
Net cash provided by operating activities	258,965	22,236
Cash flows from investing activities:
Purchases of marketable securities	(207,546)	(23,312)
Maturities of marketable securities	137,014	28,890
Sales of marketable securities	26,613	0
Purchases of property and equipment	(7,272)	(6,897)
Purchase of equity investment	(8,000)	0
Purchase of convertible promissory note	(5,000)	0
Collections of employee loans	1,319	0
Purchase of intangible assets	(162)	0
Net cash used in investing activities	(63,034)	(1,319)
Cash flows from financing activities:
Proceeds from international employee stock sales to be remitted to employees and tax authorities, net	218,540	0
Proceeds from exercise of stock options, net of repurchases	9,586	1,781
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions and other offering costs	0	543,471
Net cash provided by financing activities	228,126	545,252
Net increase in cash, cash equivalents, and restricted cash	424,057	566,169
Cash, cash equivalents, and restricted cash – beginning of period	334,082	65,968
Cash, cash equivalents, and restricted cash – end of period	758,139	632,137
Reconciliation of cash, cash equivalents, and restricted cash within the condensed consolidated balance sheets to the amounts shown in the condensed consolidated statements of cash flows above:
Cash and cash equivalents	488,653	629,793
Total cash, cash equivalents, and restricted cash	$ 758,139	$ 632,137