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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Cash flows from operating activities |  |
Net income (loss) | $ 357,912 | $ (70,550)
Adjustments to reconcile net income / (loss) to net cash generated from / used in operating activities: |  |
Depreciation and amortization | 3,667 | 3,505
Share-based compensation expense | 12,792 | 10,078
Change in fair value of derivative financial instruments |  | (2,206)
Unrealized foreign exchange gains, net | (12,279) | (908)
Other non-cash items, net | 539 | (1,600)
Changes in operating assets and liabilities: |  |
Accounts receivable, prepaid expenses, and other current assets and receivables | (3,355) | 1,050
Accounts payable | 10,444 | (981)
Accrued expenses, other liabilities, and operating leases | 5,486 | (1,332)
Net cash generated from / (used) in operating activities | 375,206 | (62,944)
Cash flows from investing activities |  |
Purchases of intangible assets |  | (2,214)
Purchases of property, plant and equipment | (6,191) | (2,392)
Net cash used in investing activities | (6,191) | (4,606)
Cash flows from financing activities |  |
Proceeds from loan increment, net of debt issuance costs | 34,603 |
Proceeds from issuance of ordinary shares | 30,899 |
Share issuance costs from issuance of ordinary shares | (1,334) |
Proceeds from issuance of ordinary shares related to employee stock option and purchase plans | 960 | 3,549
Net cash generated from financing activities | 65,128 | 3,549
Currency effect on cash, cash equivalents and restricted cash | (1,665) | 223
Net increase / (decrease) in cash, cash equivalents and restricted cash | 432,478 | (63,778)
Cash, cash equivalents and restricted cash at beginning of period | 247,680 | 380,726
Cash, cash equivalents and restricted cash at the end of period | 680,158 | 316,948
Cash and cash equivalents | 677,330 | 314,265
Restricted cash related to leasehold and other deposits | 2,828 | 2,683
Total cash, cash equivalents and restricted cash | 680,158 | 316,948
Supplemental cash flow disclosures: |  |
Cash paid for interest | (2,943) | (2,545)
Non-cash increase in accounts payables and accrued expenses and other current liabilities related to purchases of intangible assets and property, plant, and equipment | $ 3,488 | $ 1,021

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- Definition Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6812-107765 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 210 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120413173&loc=SL116631458-115580 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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