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CONSOLIDATED CONDENSED BALANCE SHEETS - USD ($) | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Current assets: |  |  |
Cash | $ 9,873,000 | $ 6,942,000 | $ 12,889,000
Prepaid expenses |  | 698,000 | 868,000
Total current assets | 53,336,000 | 49,277,000 | 28,798,000
Total assets | 212,390,000 | 205,850,000 | 188,047,000
Current liabilities: |  |  |
Accounts payable | 21,721,000 | 13,749,000 | 12,691,000
Accounts payable - related party | 321,000 | 399,000 | 190,000
Accrued expenses | 17,084,000 | 16,072,000 | 7,307,000
Total current liabilities | 208,250,000 | 190,515,000 | 109,348,000
Total liabilities | 467,044,000 | 383,259,000 | 212,579,000
Commitments and Contingencies (Note 5) |  |  |
Class A common stock, $0.0001 par value; 8,640,832 and 24,275,528 shares subject to possible redemption at $10.00 per share as of March 31, 2021 and December 31, 2020, respectively | 220,955,000 | 220,563,000 | 231,129,000
Stockholders' Equity: |  |  |
Common stock | 0 | 0 |
Additional paid-in capital | 14,726,000 | 10,061,000 | 3,339,000
Accumulated deficit | (490,394,000) | (407,841,000) | (259,054,000)
Total stockholders' deficit | (475,609,000) | (397,972,000) | (255,661,000)
Total liabilities, convertible preferred stock and stockholders' deficit | 212,390,000 | 205,850,000 | 188,047,000
Star Peak Energy Transition Corp [Member] |  |  |
Current assets: |  |  |
Cash | 426,064 | 936,773 |
Prepaid expenses | 586,259 | 627,564 | 1,594
Total current assets | 1,012,323 | 1,564,337 | 1,594
Investments held in Trust Account | 383,585,733 | 383,721,747 |
Total assets | 384,598,056 | 385,286,084 | 253,018
Current liabilities: |  |  |
Accounts payable | 21,152 | 93,965 | 35,093
Accounts payable - related party | 0 | 50,000 |
Accrued expenses | 2,616,157 | 2,467,064 | 154,174
Franchise tax payable | 49,315 | 198,406 |
Total current liabilities | 2,686,624 | 2,809,435 | 246,568
Fair value of warrants | 276,873,719 | 121,091,978 |
Deferred legal fees | 203,910 | 203,910 |
Deferred underwriting commissions in connection with the initial public offering | 13,425,476 | 13,425,476 |
Total liabilities | 293,189,729 | 137,530,799 | 246,568
Commitments and Contingencies (Note 5) |  |  |
Class A common stock, $0.0001 par value; 8,640,832 and 24,275,528 shares subject to possible redemption at $10.00 per share as of March 31, 2021 and December 31, 2020, respectively | 86,408,320 | 242,755,280 |
Stockholders' Equity: |  |  |
Additional paid-in capital | 273,994,882 | 117,649,486 | 23,994
Accumulated deficit | (268,998,806) | (112,651,848) | (18,550)
Total stockholders' deficit | 5,000,007 | 5,000,005 | 6,450
Total liabilities, convertible preferred stock and stockholders' deficit | 384,598,056 | 385,286,084 | 253,018
Class A common stock | Star Peak Energy Transition Corp [Member] |  |  |
Stockholders' Equity: |  |  |
Common stock |  | 1,408 |
Total stockholders' deficit | 2,972 | 1,408 |
Class A shares | Star Peak Energy Transition Corp [Member] |  |  |
Stockholders' Equity: |  |  |
Common stock | 2,972 | 1,408 |
Common Class B | Star Peak Energy Transition Corp [Member] |  |  |
Stockholders' Equity: |  |  |
Common stock | 959 | 959 | 1,006
Total stockholders' deficit | $ 959 | $ 959 | $ 1,006

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