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Fair Value Measurement (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Fair Value Disclosures [Abstract] |  |
Schedule of fair value measurements of group’s assets and liabilities of recurring basis |
|  | Fair Value Measurement as of December 31, 2021
(In thousands) |  | Quoted Prices in Active Market for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Cash and cash equivalents |  | $ | 480,931 |  | — |  | — |  | $ | 480,931
Restricted cash |  |  | 55,178 |  | — |  | — |  |  | 55,178
Total financial asset |  | $ | 536,109 |  | — |  | — |  | $ | 536,109
Warrant liability |  | $ | — |  | — |  | 1,105 |  | $ | 1,105
Total financial liability |  | $ | — |  | — |  | 1,105 |  | $ | 1,105
|  | Fair Value Measurement as of March 31, 2022
(In thousands) |  | Quoted Prices in Active Market for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Cash and cash equivalents |  | $ | 416,165 |  | — |  | — |  | $ | 416,165
Restricted cash |  | $ | 54,568 |  | — |  | — |  | $ | 54,568
Total financial asset |  | $ | 470,733 |  | — |  | — |  | $ | 470,733
Warrant liability |  | $ | — |  | — |  | 1,540 |  | $ | 1,540
Total financial liability |  | $ | — |  | — |  | 1,540 |  | $ | 1,540
|  | Fair Value Measurement as of December 31, 2020
(In thousands) |  | Quoted Prices in Active Market for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Cash and cash equivalents |  | $ | 21,496 |  | — |  | — |  | $ | 21,496
Restricted cash |  |  | 19,700 |  | — |  | — |  |  | 19,700
Total |  | $ | 41,196 |  | — |  | — |  | $ | 41,196
|  | Fair Value Measurement as of December 31, 2021
(In thousands) |  | Quoted Prices in Active Market for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Cash and cash equivalents |  | $ | 480,931 |  | — |  | — |  | $ | 480,931
Restricted cash |  |  | 55,178 |  | — |  | — |  |  | 55,178
Total financial asset |  | $ | 536,109 |  | — |  | — |  | $ | 536,109
Warrant liability |  | $ | — |  | — |  | 1,105 |  | $ | 1,105
Total financial liability |  | $ | — |  | — |  | 1,105 |  | $ | 1,105
Schedule of reconciliation of the beginning and ending balances for level 3 convertible notes |
(In thousands) |  | Convertible Notes
Balance as of January 1, 2021 |  | $ | —
Issuance of convertible notes |  | $ | 57,500
Changes in fair value of convertible notes |  | $ | 3,600
Balance as of March 31, 2021 |  | $ | 61,100
(In thousands) |  | Bridge Notes
Balance as of January 1, 2021 |  | $ | — |
Issuance of Bridge Notes |  |  | 57,500 |
Changes in fair value of Bridge Notes |  |  | 9,861 |
Conversion as of Merger |  |  | (67,361 | )
Balance as of December 31, 2021 |  | $ | — |
Schedule of reconciliation of the beginning and ending balances for Level 3 warrant liability |
(In thousands) |  | Three Months Ended March 31,
2021 |  | 2022
Balance at the beginning of the period |  |  | — |  | $ | 1,105
Changes in fair value |  |  | — |  |  | 435
Balance at end of the period |  | $ | — |  | $ | 1,540
(In thousands) |  | Warrant Liability
Balance as of January 1, 2021 |  | $ | — |
Assumed warrant liability upon Merger |  |  | 3,574 |
Changes in fair value |  |  | (2,469 | )
Balance as of December 31, 2021 |  | $ | 1,105 |

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI https://asc.fasb.org/extlink&oid=126976982&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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