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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Deferred Offering Costs (Details) $ in Millions | Dec. 31, 2024 USD ($)
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IPO |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Offering costs incurred | $ 2.4

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of deferred offering costs incurred. + References No definition available. + Details
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Namespace Prefix: | zspc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |