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v3.21.2

Consolidated statements of cash flows - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Operating activities |  |
Net loss | $ (396,234) | $ (128,617)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Allowance for doubtful accounts | 4 | 2
Inventory write-down | 290 | 7
Depreciation and amortization expenses | 2,975 | 2,107
Amortization of deferred income | (156) | (156)
Share-based compensation | 17,550 | 13,427
Noncash research and development expenses | 62,250 |
Share of loss from equity method investment | 208 | 406
Loss on disposal of property and equipment | 4 | 1
Noncash lease expenses | 2,779 | 2,114
Changes in operating assets and liabilities: |  |
Accounts receivable | (12,868) | (3,235)
Inventories | 1,740 | (571)
Prepayments and other current assets | (1,952) | (948)
Long term deposits | (29) | (335)
Value added tax recoverable | (1,682) | (2,422)
Accounts payable | 62,980 | 9,732
Other current liabilities | 28,077 | 4,697
Operating lease liabilities | (2,214) | (1,539)
Deferred income | 930 | 13,011
Net cash used in operating activities | (235,348) | (92,319)
Cash flows from investing activities: |  |
Purchases of short-term investments |  | (205,000)
Proceeds from maturity of short-term investments | 743,902 | 200,000
Purchase of property and equipment | (5,647) | (1,303)
Purchase of intangible assets | (427) | (218)
Net cash provided by (used in) investing activities | 737,828 | (6,521)
Cash flows from financing activities: |  |
Repayment of short-term borrowings |  | (2,130)
Proceeds from exercises of stock options | 3,992 | 3,075
Proceeds from issuance of ordinary shares upon public offerings | 818,874 | 281,295
Payment of public offering costs | (1,323) | (740)
Employee taxes paid related to net share settlement of equity awards | (594) |
Net cash provided by financing activities | 820,949 | 281,500
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash | 1,028 | 12
Net increase in cash, cash equivalents and restricted cash | 1,324,457 | 182,672
Cash, cash equivalents and restricted cash - beginning of period | 442,859 | 76,442
Cash, cash equivalents and restricted cash - end of period | 1,767,316 | 259,114
Supplemental disclosure on non-cash investing and financing activities: |  |
Payables for purchase of property and equipment | 1,720 | 984
Payables for intangible assets | 58 |
Payables for public offering costs | 555 |
Supplemental disclosure of cash flow information: |  |
Cash and cash equivalents | 1,766,573 | 258,604
Restricted cash, non-current | 743 | 510
Total cash and cash equivalents and restricted cash | $ 1,767,316 | 259,114
Interest paid |  | $ 122

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