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Revenue Recognition - Roll forward of deferred revenue (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 USD ($)
Revenue Recognition |
Balance at December 31, 2021 | $ 9,165
Revenue recognized | (6,409)
Revenue deferred | 9,194
Balance at March 31, 2022 | $ 11,950

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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
Name: | nhic_DeferredRevenueAdditionsDuringPeriod
Namespace Prefix: | nhic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of revenue recognized during the period that was previously reported as deferred or unearned revenue. + References No definition available. + Details
Name: | nhic_DeferredRevenueRevenueRecognizedDuringPeriod
Namespace Prefix: | nhic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(5)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DeferredRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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