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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net loss | $ (86,414) | $ (37,120) | $ (56,273)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |  |
Depreciation | 12,126 | 8,724 | 5,654
Amortization of intangible assets | 4,588 | 2,784 | 2,753
Share based compensation expenses | 109,337 | 72,330 | 47,700
Amortization of debt discount and debt issuance costs | 20,938 | 10,004 |
Increase in accrued interest and exchange rate on short-term and long-term deposits | 748 | (583) | (555)
Amortization of premium and discount and accrued interest on marketable securities, net | (346) | (99) | (77)
Deferred taxes, net | 935 | (959) | (2,719)
Changes in operating lease right-of-use assets | 18,225 |  |
Changes in operating lease liabilities | (15,376) |  |
Increase in trade receivables | (3,459) | (2,128) | (1,936)
Increase in prepaid expenses and other current and long-term assets | (5,168) | (3,665) | (1,824)
Increase (decrease) in trade payables | (7,560) | 10,933 | 11,834
Increase in employees and payroll accruals | 7,781 | 2,843 | 5,627
Increase in short-term and long-term deferred revenues | 71,397 | 54,681 | 58,353
Increase (decrease) in accrued expenses and other current liabilities | 21,812 | (2,036) | 14,515
Net cash provided by operating activities | 149,564 | 115,709 | 83,052
Cash flows from investing activities: |  |  |
Proceeds from short-term and restricted deposits | 348,775 | 204,125 | 52,311
Investment in short-term and restricted deposits | (296,100) | (437,979) | (88,706)
Investment in marketable securities | (402,774) | (58,963) | (33,189)
Proceeds from marketable securities | 132,905 | 21,054 | 245
Purchase of property and equipment | (21,427) | (13,684) | (11,649)
Capitalization of software development costs | (639) | (392) | (720)
Payments for businesses acquired |  |  | (33,091)
Purchases of investments in privately-held companies | (3,862) | (1,250) |
Investment in other long-term assets | (891) | (500) |
Acquisition of intangible assets |  |  | (75)
Net cash used in investing activities | (244,013) | (287,589) | (114,874)
Cash flows from financing activities: |  |  |
Credit line repayment |  |  | (170)
Proceeds from issuance of convertible senior notes |  | 442,750 |
Payments of debt issuance costs |  | (12,601) |
Purchase of capped call |  | (45,338) |
Proceeds from exercise of options and ESPP shares | 31,495 | 32,896 | 24,158
Net cash provided by financing activities | 31,495 | 417,707 | 23,988
Increase (decrease) in cash and cash equivalents | (62,954) | 245,827 | (7,834)
Cash and cash equivalents at the beginning of the year | 331,057 | 85,230 | 93,064
Cash and cash equivalents at the end of the year | 268,103 | 331,057 | 85,230
Supplemental disclosure of cash flow activities: |  |  |
Cash paid during the year for taxes | 3,109 | 3,666 | 4,422
Supplemental information for non-cash transactions |  |  |
Right-of-use asset recognized with corresponding lease liability | 46,121 |  |
Non-cash purchase of property and equipment | $ 1,232 | $ 1,413 | $ 1,019

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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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