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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) | Star Peak Energy Transition Corp [Member] Class A common stock Additional paid-in capital | Star Peak Energy Transition Corp [Member] Class A common stock | Star Peak Energy Transition Corp [Member] Common Class B | Star Peak Energy Transition Corp [Member] Additional paid-in capital | Star Peak Energy Transition Corp [Member] Deficit | Star Peak Energy Transition Corp [Member] | Additional paid-in capital | Deficit | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2018 |  |  | $ 1,006 | $ 23,994 | $ (8,144) | $ 16,856 | $ 555,000 | $ (210,596,000) | $ (210,041,000)
Balance, beginning of period (in shares) at Dec. 31, 2018 |  |  | 10,062,500 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Excess of cash received over fair value of private placement warrants |  |  |  |  |  |  | 1,217,000 |  | 1,217,000
Net loss |  |  |  |  | (10,406) | (10,406) |  | (59,414,000) | (59,414,000)
Balance, end of period at Dec. 31, 2019 |  |  | $ 1,006 | 23,994 | (18,550) | 6,450 | 3,339,000 | (259,054,000) | (255,661,000)
Balance, end of period (in shares) at Dec. 31, 2019 |  |  | 10,062,500 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net loss |  |  | $ 0 |  | (1,100) | (1,100) |  | (17,471,000) | (17,471,000)
Balance, end of period at Mar. 31, 2020 |  |  | $ 1,006 | 23,994 | (19,650) | 5,350 | 3,816,000 | (269,188,000) | (264,867,000)
Balance, end of period (in shares) at Mar. 31, 2020 |  |  | 10,062,500 |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2019 |  |  | $ 1,006 | 23,994 | (18,550) | 6,450 | 3,339,000 | (259,054,000) | (255,661,000)
Balance, beginning of period (in shares) at Dec. 31, 2019 |  |  | 10,062,500 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Sale of Class A shares in initial public offering, less fair value of public warrants |  | $ 3,836 |  | 376,929,142 |  | 376,932,978 |  |  |
Sale of Class A shares in initial public offering, less fair value of public warrants (in shares) |  | 38,358,504 |  |  |  |  |  |  |
Offering costs |  |  |  | (22,152,459) |  | (22,152,459) |  |  |
Excess of cash received over fair value of private placement warrants |  |  |  | 5,601,614 |  | 5,601,614 | 168,000 |  | 168,000
Class B common stock forfeited |  |  | $ (47) | 47 |  |  |  |  |
Class B common stock forfeited (in shares) |  |  | (472,874) |  |  |  |  |  |
Class A common stock subject to possible redemption | $ (242,752,852) | $ (2,428) |  |  |  | (242,755,280) |  |  |
Class A common stock subject to possible redemption (in shares) |  | (24,275,528) |  |  |  |  |  |  |
Net loss |  |  | $ 112,600,000 |  | (112,633,298) | (112,633,298) |  | (156,124,000) | (156,124,000)
Balance, end of period at Dec. 31, 2020 |  | $ 1,408 | $ 959 | 117,649,486 | (112,651,848) | 5,000,005 | 10,061,000 | (407,841,000) | (397,972,000)
Balance, end of period (in shares) at Dec. 31, 2020 |  | 14,082,976 | 9,589,626 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Class A common stock subject to possible redemption |  | $ (1,564) |  | (156,345,396) |  | (156,346,960) |  |  |
Class A common stock subject to possible redemption (in shares) |  | (15,634,696) |  |  |  |  |  |  |
Net loss |  |  | $ 156,300,000 |  | (156,346,958) | (156,346,958) |  | (82,553,000) | (82,553,000)
Balance, end of period at Mar. 31, 2021 |  | $ 2,972 | $ 959 | $ 273,994,882 | $ (268,998,806) | $ 5,000,007 | $ 14,726,000 | $ (490,394,000) | $ (475,609,000)
Balance, end of period (in shares) at Mar. 31, 2021 |  | 29,717,672 | 9,589,626 |  |  |  |  |  |

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