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General - Summary of Estimated Useful Lives of Intangible Assets (Details) | Dec. 31, 2023
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Subscriber relationships | Minimum |
Schedule of Accounting Policies [Line Items] |
Estimated useful lives of intangible assets | 7 years
Subscriber relationships | Maximum |
Schedule of Accounting Policies [Line Items] |
Estimated useful lives of intangible assets | 10 years
Developed technology | Minimum |
Schedule of Accounting Policies [Line Items] |
Estimated useful lives of intangible assets | 5 years
Developed technology | Maximum |
Schedule of Accounting Policies [Line Items] |
Estimated useful lives of intangible assets | 10 years

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- Definition Schedule of accounting policies. + References No definition available. + Details
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Namespace Prefix: | spsc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |