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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Cash Flows from Operating Activities: |  |  |  |  |
Net income (loss) |  |  |  | $ (102,493,000) | $ (88,387,000)
Changes in operating assets and liabilities: |  |  |  |  |
Net cash used in operating activities | $ (33,151,000) | $ (29,787,000) |  | (99,162,000) | (47,235,000)
Cash Flows from Financing Activities: |  |  |  |  |
Net cash used in financing activities | (73,000) | 63,211,000 |  | 173,344,000 | 38,494,000
Net change in cash | (34,411,000) | 33,313,000 |  | 72,230,000 | (12,267,000)
Cash - beginning of the period | 77,094,000 | 4,864,000 |  | 4,864,000 | 17,131,000
Cash - ending of the period | 42,683,000 | 38,177,000 | $ 4,864,000 | 77,094,000 | 4,864,000
SPRING VALLEY ACQUISITION CORP |  |  |  |  |
Cash Flows from Operating Activities: |  |  |  |  |
Net income (loss) | (15,958,891) | 8,734,669 | (12,971,424) | 3,202,748 |
Adjustments to reconcile net income (loss) to net cash used in operating activities: |  |  |  |  |
Change in fair value of derivative warrant liabilities | 10,835,000 | (9,028,000) | 12,110,000 | (4,511,000) |
Income from investments held in Trust Account | (23,395) | (5,729) | (1,973) | (18,965) |
Changes in operating assets and liabilities: |  |  |  |  |
Prepaid expenses | 27,803 | 64,998 | (237,088) | 135,895 |
Related party receivable |  | (25,000) |  |  |
Accounts payable |  |  |  | (305,022) |
Accounts payable | 195,091 |  |  |  |
Accrued expenses | 4,906,034 | 37,148 |  | (9,934) |
Net cash used in operating activities | (408,540) | (221,914) | (346,232) | (896,234) |
Cash Flows from Financing Activities: |  |  |  |  |
Payment of offering costs |  | (25,000) | (372,594) | (25,000) |
Net cash used in financing activities |  | 25,000 | 234,552,580 | (25,000) |
Net change in cash | (408,540) | (246,914) | 1,906,348 | (921,234) |
Cash - beginning of the period | 985,114 | 1,906,348 |  | 1,906,348 |
Cash - ending of the period | $ 576,574 | $ 1,659,434 | 1,906,348 | $ 985,114 | $ 1,906,348
Supplemental disclosure of noncash financing activities: |  |  |  |  |
Warrant liabilities in connection with initial public offering |  |  | 22,529,000 |  |
Deferred underwriting fee payable |  |  | 8,050,000 |  |
Accrued offering costs |  |  | 49,934 |  |
Offering costs paid by Sponsor in exchange for Founder Shares |  |  | 20,000 |  |
Offering costs paid directly through note payable |  |  | $ 124,826 |  |

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