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Contingencies (Details)	Dec. 03, 2024 item
Contingencies
Number of claimants	2

X

- Definition

Represents the number of claimants.

+ References

No definition available.

+ Details

Name:	sldp_NumberOfClaimants
Namespace Prefix:	sldp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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