XML 82 R70.htm IDEA: XBRL DOCUMENT
v3.22.0.1

FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities on Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Public common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | $ 18,666 |
Private common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 8,855 |
Level 1 | Public common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 18,666 |
Level 1 | Private common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 0 |
Level 2 | Public common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 0 |
Level 2 | Private common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 8,855 |
Level 3 | Public common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 0 |
Level 3 | Private common stock warrants |  |
Liabilities, Fair Value Disclosure [Abstract] |  |
Common stock warrants | 0 |
Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 238,022 | $ 3,372
Liabilities, Fair Value Disclosure [Abstract] |  |
Earnout warrant liabilities | 1,476 |
Derivative liabilities |  | 22,911
Warrant liabilities |  | 3,329
Total liabilities | 28,997 | 26,240
Fair Value, Recurring | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 237,897 | 3,046
Fair Value, Recurring | Certificate of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 125 | 326
Fair Value, Recurring | Level 1 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 237,897 | 3,046
Liabilities, Fair Value Disclosure [Abstract] |  |
Earnout warrant liabilities | 0 |
Derivative liabilities |  | 0
Warrant liabilities |  | 0
Total liabilities | 18,666 | 0
Fair Value, Recurring | Level 1 | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 237,897 | 3,046
Fair Value, Recurring | Level 1 | Certificate of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 0 | 0
Fair Value, Recurring | Level 2 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 125 | 326
Liabilities, Fair Value Disclosure [Abstract] |  |
Earnout warrant liabilities | 1,476 |
Derivative liabilities |  | 0
Warrant liabilities |  | 0
Total liabilities | 10,331 | 0
Fair Value, Recurring | Level 2 | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 0 | 0
Fair Value, Recurring | Level 2 | Certificate of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 125 | 326
Fair Value, Recurring | Level 3 |  |
Assets, Fair Value Disclosure [Abstract] |  |
Total assets | 0 | 0
Liabilities, Fair Value Disclosure [Abstract] |  |
Earnout warrant liabilities | 0 |
Derivative liabilities |  | 22,911
Warrant liabilities |  | 3,329
Total liabilities | 0 | 26,240
Fair Value, Recurring | Level 3 | Money market funds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | 0 | 0
Fair Value, Recurring | Level 3 | Certificate of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and restricted cash: | $ 0 | $ 0

X
- Definition Common Stock Warrants, Fair Value Disclosure + References No definition available. + Details
Name: | ghw_CommonStockWarrantsFairValueDisclosure
Namespace Prefix: | ghw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Earnout Warrant Liabilities, Fair Value Disclosure + References No definition available. + Details
Name: | ghw_EarnoutWarrantLiabilitiesFairValueDisclosure
Namespace Prefix: | ghw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Warrant Liabilities, Fair Value Disclosure + References No definition available. + Details
Name: | ghw_WarrantLiabilitiesFairValueDisclosure
Namespace Prefix: | ghw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ghw_PublicWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ghw_PrivateWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |