CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ 9,966	$ 1,887
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	46,532	4,627
Amortization of deferred contract acquisition costs	25,939	14,362
Depreciation and amortization	11,589	4,459
Amortization of operating lease right-of-use assets	4,840	0
Provision for accounts receivable allowances	3,976	1,493
Other	(1,577)	17
Changes in operating assets and liabilities:
Accounts receivable	(36,886)	(27,775)
Prepaid expenses and other assets	(22,439)	(6,450)
Deferred contract acquisition costs	(50,824)	(32,875)
Accounts payable	(1,118)	369
Accrued expenses and other liabilities	53,485	22,644
Deferred revenue	76,579	52,583
Operating lease liabilities, net	(4,724)	0
Net cash provided by operating activities	115,338	35,341
Cash flows from investing activities:
Purchases of marketable securities	(629,107)	(49,159)
Maturities of marketable securities	164,140	43,547
Purchases of property and equipment	(28,132)	(18,121)
Purchase of equity investment	(3,000)	0
Net cash used in investing activities	(496,099)	(23,733)
Cash flows from financing activities:
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions and other offering costs	542,492	0
Proceeds from international employee stock sales to be remitted to employees and tax authorities	48,547	0
Proceeds from exercise of stock options, net of repurchases	5,584	2,714
Proceeds from issuance of convertible debt, net	0	15,000
Principal payments on capital lease obligations	0	(92)
Net cash provided by financing activities	596,623	17,622
Net increase in cash, cash equivalents, and restricted cash	215,862	29,230
Cash, cash equivalents, and restricted cash – beginning of period	65,968	36,821
Cash, cash equivalents, and restricted cash – end of period	281,830	66,051
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	230,874	63,707
Total cash, cash equivalents, and restricted cash	$ 65,968	$ 36,821