Income Taxes - Components of income tax provision (benefit) (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	$ 0	$ 0
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	0	0
Star Peak Energy Transition Corp [Member]
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	(13,468)	(176)
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	(695,046)	(2,009)
Valuation allowance	$ 708,514	$ 2,185

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.7)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

Name:	us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration