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Investments in Non-Marketable Securities - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Unrealized or realized gains or losses	$ 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_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration