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Commitments and Contingencies - Narrative (Details) ft² in Thousands | Dec. 31, 2023 ft² option
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Commitments and Contingencies Disclosure [Abstract] |
Current leased space | ft² | 198
Number of extension options | option | 2
Lease extension period | 5 years

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- Definition Area of leased space. + References No definition available. + Details
Name: | spsc_LesseeOperatingLeaseAreaOfLeasedSpace
Namespace Prefix: | spsc_
Data Type: | dtr-types1:areaItemType
Balance Type: | na
Period Type: | instant

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- Definition Lessee, Operating Lease, Number Of Extension Options + References No definition available. + Details
Name: | spsc_LesseeOperatingLeaseNumberOfExtensionOptions
Namespace Prefix: | spsc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant