Investments in Non-Marketable Securities - Narrative (Details) - USD ($)	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract]
Unrealized or realized gains or losses	$ 0	$ 0

Equity Securities Without Readily Determinable Fair Value, Realized Upward (Downward) Price Adjustment, Annual Amount

No definition available.

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Namespace Prefix:	cdxs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration