CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Cash flows from operating activities:
Net income	$ 7,755	$ 2,485
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	24,737	1,975
Amortization of deferred contract acquisition costs	16,026	8,647
Depreciation and amortization	7,174	2,618
Amortization of operating lease right-of-use assets	3,116	0
Provision for accounts receivable allowances	2,693	1,056
Other	(514)	38
Changes in operating assets and liabilities:
Accounts receivable	(35,361)	(22,600)
Prepaid expenses and other assets	(23,597)	(4,132)
Deferred contract acquisition costs	(33,700)	(22,768)
Accounts payable	(2,783)	(206)
Accrued expenses and other liabilities	34,923	14,561
Deferred revenue	56,234	35,436
Operating lease liabilities, net	(3,295)	0
Net cash provided by operating activities	53,408	17,110
Cash flows from investing activities:
Purchases of marketable securities	(478,487)	(30,276)
Maturities of marketable securities	50,940	23,755
Purchases of property and equipment	(20,937)	(10,027)
Net cash used in investing activities	(448,484)	(16,548)
Cash flows from financing activities:
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions and other offering costs	542,947	0
Proceeds from exercise of stock options, net of repurchases	2,191	576
Principal payments on capital lease obligations	0	(92)
Net cash provided by financing activities	545,138	484
Net increase in cash, cash equivalents, and restricted cash	150,062	1,046
Cash, cash equivalents, and restricted cash – beginning of period	65,968	36,821
Cash, cash equivalents, and restricted cash – end of period	216,030	37,867
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	213,886	36,492
Total cash, cash equivalents, and restricted cash	$ 65,968	$ 36,821