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The Company - Liquidity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2022 | Aug. 31, 2020
Preferred Units [Line Items] |  |  |  |  |
Convertible preferred units |  | $ 819,694 | $ 629,089 | $ 819,694 |
Convertible preferred units outstanding |  | 633,261 | 542,729 |  |
Proceeds from the sale of convertible preferred units | $ 40,500 | $ 192,500 | $ 18,500 |  |
Fluor Enterprises |  |  |  |  |
Preferred Units [Line Items] |  |  |  |  |
New equity financing |  | 753,306 |  |  |
Convertible preferred units |  | $ 0 | $ 10,000 |  | $ 10,000
Convertible preferred units issued |  |  | 5,208 |  |
Share price |  |  | $ 1.92 |  | $ 1.92
Convertible preferred units outstanding |  | 0 | 0 |  |
Proceeds from the sale of convertible preferred units |  | $ 192,500 | $ 8,500 |  |

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- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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