Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Apr. 30, 2019	Jan. 31, 2019
Current assets:
Cash and cash equivalents		$ 748,158	$ 550,971
Short-term investments		581,490	539,190
Accounts receivable, net of allowance for doubtful accounts of $321 and $468, respectively		164,108	303,465
Unbilled accounts receivable		23,366	18,122
Prepaid expenses and other current assets		20,729	21,666
Total current assets		1,537,851	1,433,414
Property and equipment, net	[1]	55,266	54,966
Deferred costs, net		30,621	30,869
Lease right-of-use assets	[1]	15,495
Goodwill		95,804	95,804
Intangible assets, net		22,951	24,521
Deferred income taxes, noncurrent		6,494	5,938
Other long-term assets		11,622	8,254
Total assets		1,776,104	1,653,766
Current liabilities:
Accounts payable		8,361	9,110
Accrued compensation and benefits		15,372	15,324
Accrued expenses and other current liabilities		15,037	16,145
Income tax payable		4,039	4,086
Deferred revenue		363,943	356,357
Lease liabilities	[1]	5,835
Total current liabilities		412,587	401,022
Deferred income taxes, noncurrent		7,300	6,095
Lease liabilities, noncurrent	[1]	13,435
Other long-term liabilities		7,679	8,900
Total liabilities		441,001	416,017
Commitments and contingencies (Note 13)
Stockholders’ equity:
Additional paid-in capital		641,925	617,623
Accumulated other comprehensive income		1,188	928
Retained earnings	[1]	691,989	619,197
Total stockholders’ equity		1,335,103	1,237,749
Total liabilities and stockholders’ equity		1,776,104	1,653,766
Class A common stock [Member]
Stockholders’ equity:
Class A common stock, $0.00001 par value; 800,000,000 shares authorized, 127,826,549 and 125,980,019 issued and outstanding at April 30, 2019 and January 31, 2019, respectively		$ 1	$ 1

[1] We adopted ASU 2016-02, “Leases” (Topic 842) using the modified retrospective method as of February 1, 2019 and elected the transition option that allows us not to restate the comparative periods in our financial statements in the year of adoption.