Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Supplemental Cash Flow Elements [Abstract] | ||||
| Income Taxes Paid | $ 2 | $ 7 | $ 2 | |
| Noncash investing and financing activities: | ||||
| Property and equipment included in accounts payable | 4,532 | 1,454 | 168 | |
| Vesting of early exercised stock options | 182 | 388 | 602 | |
| Non-cash acquisition | 1,939,813 | 0 | (29,905) | |
| Cash, cash equivalents, and restricted cash at end of year: | ||||
| Cash and cash equivalents | 1,610,135 | 387,346 | 246,490 | |
| Restricted cash | 16,112 | 12,482 | 482 | |
| Total cash, cash equivalents, and restricted cash | $ 1,626,247 | $ 399,828 | $ 246,972 | $ 79,530 |
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- Definition Vesting Of Early Exercised Stock Options No definition available.
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- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. 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. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- References No definition available.
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cash restricted as to withdrawal or usage. 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. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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