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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
OPERATING ACTIVITIES |  |  |  |
Net loss |  |  | $ (156,124,000) | $ (59,414,000)
Adjustments to reconcile net loss to net cash used in operating activities |  |  |  |
Change in fair value of warrant liabilities | $ 66,397,000 | $ (1,009,000) | 84,455,000 | (1,493,000)
Changes in operating assets and liabilities |  |  |  |
Net cash used in operating activities | (1,827,000) | (10,670,000) | (33,671,000) | (29,678,000)
Net decrease in cash and cash equivalents | 2,931,000 | (2,009,000) | (5,947,000) | (9,005,000)
Cash and cash equivalents, beginning of year | 6,942,000 | 12,889,000 | 12,889,000 | 21,894,000
Cash and cash equivalents, end of year of year | 9,873,000 | 10,880,000 | 6,942,000 | 12,889,000
Star Peak Energy Transition Corp [Member] |  |  |  |
OPERATING ACTIVITIES |  |  |  |
Net loss | (156,346,958) | (1,100) | (112,633,298) | (10,406)
Adjustments to reconcile net loss to net cash used in operating activities |  |  |  |
Change in fair value of warrant liabilities | 155,781,741 | 0 | (109,269,830) |
Unrealized gain from Investments held in Trust Account | (35,469) | 0 | (136,707) |
Changes in operating assets and liabilities |  |  |  |
Prepaid expenses | 41,305 | 0 | (625,970) | (1,594)
Franchise tax payable | 22,392 | 1,100 | 198,406 | (4,695)
Accounts payable | (122,813) | 0 | (281,128) | (778)
Accrued expenses | 149,093 | 0 | 2,370,390 |
Net cash used in operating activities | (510,709) | 0 | (1,838,477) | (17,473)
Net decrease in cash and cash equivalents | (510,709) | 0 | 936,773 | (159,672)
Cash and cash equivalents, beginning of year | 936,773 | 0 | 0 | 159,672
Cash and cash equivalents, end of year of year | 426,064 | 0 | 936,773 | $ 0
Supplemental disclosure of noncash activities: |  |  |  |
Change in value of Class A common stock subject to possible redemption | $ (156,346,960) | $ 0 | $ (92,197,620) |

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