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Income Taxes - Changes in the Valuation Allowance for Deferred Tax Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |
Beginning balance | $ 53,430 | $ 1,040
Increases recorded to tax provision | 2,685 | 52,390
Decreases recorded as a benefit to income tax provision | 0 | 0
Ending balance | $ 56,115 | $ 53,430

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- Definition Valuation Allowance, Deferred Tax Asset, Decrease, Amount + References No definition available. + Details
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Namespace Prefix: | indi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Valuation Allowance, Deferred Tax Asset, Increase, Amount + References No definition available. + Details
Name: | indi_ValuationAllowanceDeferredTaxAssetIncreaseAmount
Namespace Prefix: | indi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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