CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:      
Net income (loss) $ (83,946) $ (5,758) $ 63,064
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization 14,228 15,475 10,646
Share-based compensation 95,436 71,849 55,517
Amortization of premium and accretion of discount on marketable securities, net 7,532 3,068 (47)
Deferred income taxes, net (11,972) (1,988) (6,974)
Amortization of debt discount and issuance costs 17,792 17,183 1,966
Increase in trade receivables (20,083) (17,315) (24,522)
Increase in prepaid expenses, other current and long-term assets (38,219) (20,487) (14,321)
Increase in trade payables 1,499 558 1,571
Increase in short-term and long-term deferred revenue 74,767 45,397 40,821
Increase in employees and payroll accruals 23,821 7,846 7,337
Increase (decrease) in accrued expenses and other current and long-term liabilities (6,115) (9,059) 6,652
Net cash provided by operating activities 74,740 106,769 141,710
Cash flows from investing activities:      
Investment in short-term and long-term deposits (105,069) (123,054) (33,961)
Investment in marketable securities (357,210) (405,193) (165,714)
Proceeds from sales and maturities of marketable securities 243,013 191,637 63,489
Purchase of property and equipment (8,928) (7,174) (7,036)
Business acquisitions, net of cash acquired (Schedule A) 0 (68,603) 0
Net cash used in investing activities (228,194) (412,387) (143,222)
Cash flows from financing activities:      
Proceeds from (payment of) withholding tax related to employee stock plans (789) 1,069 1,155
Proceeds from exercise of stock options 11,738 12,180 24,428
Proceeds from the issuance of convertible senior notes, net of issuance costs 0 0 560,107
Purchase of capped calls 0 0 (53,648)
Net cash provided by financing activities 10,949 13,249 532,042
Increase (decrease) in cash, cash equivalents and restricted cash (142,505) (292,369) 530,530
Effect of exchange rate differences on cash, cash equivalents and restricted cash (689) 0 0
Cash, cash equivalents and restricted cash at the beginning of the year 500,044 792,413 261,883
Cash, cash equivalents and restricted cash at the end of the year 356,850 500,044 792,413
Non-cash activities:      
Lease liabilities arising from obtaining right-of-use-assets 0 3,237 27,926
Non-cash purchase of property and equipment 2,165 1,639 960
Exercise of stock options 127 916 119
Supplemental disclosure of cash flow activities:      
Cash paid during the year for taxes, net 8,404 11,424 10,548
Reconciliation of cash, cash equivalents and restricted cash:      
Cash and cash equivalents 356,850 499,992 792,363
Restricted cash included in other long-term assets 0 52 50
Total cash, cash equivalents and restricted cash 356,850 500,044 792,413
Fair value of assets acquired and liabilities assumed at the date of acquisition:      
Goodwill 123,717 123,717 $ 82,400
Other long- term assets 121,743 99,992  
Other long- term liabilities $ (20,227) (24,920)  
Idaptive [Member]      
Fair value of assets acquired and liabilities assumed at the date of acquisition:      
Working capital, net (excluding $1,934 of cash and cash equivalents acquired) $ (6,965)   (6,965)  
Property and equipment   654  
Goodwill   41,317  
Technology   18,908  
Customer relationships   4,466  
Other long- term assets   1,076  
Deferred taxes, net   10,845  
Other long- term liabilities   (1,698)  
Total   $ 68,603