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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