Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Operating activities
Net loss	$ (32,529)	$ (2,559)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	5,468	3,178
Amortization of deferred commissions	6,081	4,178
Stock-based compensation expense	31,804	7,962
Impairment (gain) on property and equipment, and lease termination	0	(13,783)
Other	845	494
Changes in assets and liabilities:
Trade and other receivables	81,689	55,281
Deferred commissions	(4,345)	(6,702)
Prepaid expenses and other current assets	(5,809)	(891)
Other noncurrent assets	(892)	(100)
Accounts payable	(2,726)	736
Deferred revenue	(39,248)	(25,135)
Accrued expenses and other current liabilities	(20,277)	(4,246)
Other noncurrent liabilities	3,052	(171)
Net cash provided by operating activities	23,113	18,242
Investing activities
Purchases of property, equipment and other	(5,374)	(1,852)
Purchase of marketable securities	(22,748)	(68,726)
Maturities of marketable securities	76,423	0
Proceeds from sale of marketable securities	600	511
Acquisitions, net of cash acquired	(25,209)	0
Net cash provided by (used in) investing activities	23,692	(70,067)
Financing activities
Proceeds from Series F convertible preferred stock, net of issuance costs	0	69,848
Proceeds from revolving line of credit	43,000	0
Proceeds from exercise of stock options	19,180	5,276
Proceeds from share purchase plan	10,267	0
Principal payments on capital leases	(1,041)	(624)
Deferred issuance costs	0	(3,053)
Net cash provided by financing activities	71,406	71,447
Effect of exchange rate changes on cash and cash equivalents	(380)	(42)
Net increase in cash and cash equivalents	117,831	19,580
Cash and cash equivalents at beginning of period	226,866	44,876
Cash and cash equivalents at end of period	344,697	64,456
Supplemental disclosures of cash flow information:
Cash paid for interest	168	113
Cash paid for income taxes	469	302
Noncash investing and financing activities:
Other receivables related to stock option exercises	93	0
Vesting of early exercised stock options	0	207
Accrued unpaid capital expenditures	$ 1,318	$ 3,222