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v3.21.1

Income Taxes - Effective tax rate Reconciliation (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Statutory federal income tax rate (as a percent) | 21.00% | 21.00%
State taxes, net of federal tax benefit (as a percent) | 3.19% | 7.13%
Change in valuation allowance (as a percent) | (11.13%) | (25.56%)
Total | 0.00% | 0.00%
Star Peak Energy Transition Corp [Member] |  |
Statutory federal income tax rate (as a percent) | 21.00% | 21.00%
Change in fair value of derivative warrant liabilities | (20.40%) |
State taxes, net of federal tax benefit (as a percent) | 0.00% | 0.00%
Change in valuation allowance (as a percent) | (0.60%) | (21.00%)
Total | 0.00% | 0.00%

X
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the fair value of derivative warrant liabilities. + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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