Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	[1]
Cash flows from operating activities:
Net loss	$ (17,488)	$ (20,592)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and accretion	3,495	2,285
Stock-based compensation	10,884	7,959
Provision for doubtful accounts	992	1,344
Amortization of deferred commissions	2,623	2,306
Reduction in carrying amount of right-of-use assets	2,286	1,736
Other	167	11
Changes in operating assets and liabilities:
Accounts receivable	8,518	4,453
Prepaid expenses and other assets	1,591	(2,471)
Deferred commissions	(2,275)	(1,924)
Accounts payable	2,096	4
Accrued expenses and other liabilities	(2,469)	(202)
Accrued employee liabilities	(386)	3,638
Deferred revenue	(3,908)	1,477
Operating lease liabilities	(3,175)	(2,186)
Net cash provided by (used in) operating activities	2,951	(2,162)
Cash flows from investing activities:
Purchases of property and equipment	(5,120)	(1,676)
Purchases of short-term investments	(10,901)	(67,705)
Sales of short-term investments	2,511	3,496
Maturities of short-term investments	38,500	55,900
Net cash provided by (used in) investing activities	24,990	(9,985)
Cash flows from financing activities:
Proceeds from issuance of common stock upon exercise of stock options	4,022	4,846
Repurchases of unvested common stock	(7)	(40)
Principal payments on long-term debt	(1,110)	0
Net cash provided by financing activities	2,905	4,806
Effect of exchange rates on cash and cash equivalents	(427)	(75)
Net increase (decrease) in cash and cash equivalents	30,419	(7,416)
Cash and cash equivalents, beginning of period	54,275	70,024
Cash and cash equivalents, end of period	84,694	62,608
Supplemental disclosure of non-cash investing and financing activities:
Lapse in restrictions on early exercised common stock options	39	205
Property and equipment purchases accrued or in accounts payable	$ 2,604	$ 288

[1] Effective February 1, 2019, the Company adopted Topic 842 using the modified retrospective approach. See Note 2. Summary of Significant Accounting Policies and Recent Accounting Pronouncements.