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v3.22.1

Subsequent Events (Details) - Subsequent Event $ in Thousands | May 02, 2022 USD ($)
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Subsequent Event [Line Items] |
Proceeds from merger | $ 341,000
Merger Agreement |
Subsequent Event [Line Items] |
Proceeds from merger | 341,000
PIPE funding received in merger | 235,000
Cash in trust received | 145,300
Transaction costs | $ 39,300

X
- Definition Represents the amount of cash in trust received. + References No definition available. + Details
Name: | svsvu_MergerAgreementCashInTrustReceived
Namespace Prefix: | svsvu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of PIPE funding received in merger. + References No definition available. + Details
Name: | svsvu_MergerAgreementPipeFundingReceived
Namespace Prefix: | svsvu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of transaction costs incurred in merger agreement. + References No definition available. + Details
Name: | svsvu_MergerAgreementTransactionCosts
Namespace Prefix: | svsvu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate cash proceeds received from a combination of transactions in which noncurrent assets are sold, which may include the sale of a business, an investment in an affiliate (including an equity method investee), property, plant and equipment and intangible assets. Excludes sales of trading, available-for-sale, and held-to-maturity securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=svsvu_MergerAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |