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Investments in Non-Marketable Securities - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Unrealized or realized gains or losses | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Non Marketable Debt Securities Without Readily Determinable Fair Value Annual Amount + References No definition available. + Details
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Namespace Prefix: | cdxs_
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Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration