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Members' Equity (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2022 person Vote	Dec. 31, 2021 person Vote
Mezzanine and Members' Equity
Number of managers on board | person	6	6
Number of votes per unit | Vote	1	1

X

- Definition

Represents the number of managers on board.

+ References

No definition available.

+ Details

Name:	svsvu_NumberOfManagersOnBoard
Namespace Prefix:	svsvu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of votes per unit.

+ References

No definition available.

+ Details

Name:	svsvu_NumberOfVotesPerUnit
Namespace Prefix:	svsvu_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration