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Financial Statement Details - Rental Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Rental assets | $ 9,967 | $ 21,863
Less—accumulated depreciation | (5,392) | (15,754)
Total rental assets | $ 4,575 | $ 6,109

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- Definition Accumulated Depreciation, Rental Assets + References No definition available. + Details
Name: | insg_AccumulatedDepreciationRentalAssets
Namespace Prefix: | insg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Rental Assets, Gross + References No definition available. + Details
Name: | insg_RentalAssetsGross
Namespace Prefix: | insg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Rental Assets, Net + References No definition available. + Details
Name: | insg_RentalAssetsNet
Namespace Prefix: | insg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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