Stock-based Compensation - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2023	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, noncash expense			$ 2,532,000	$ 4,682,000	$ 4,911,000	$ 7,853,000
2019 Amended Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized (in shares)	8,000,000
Number of shares authorized (in shares)	23,897,144						15,897,144
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, noncash expense			$ 1,751,000	3,940,000	$ 3,404,000	6,176,000
Stock-based compensation expense				$ 2,000,000		$ 2,000,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)		2,000,000
Consecutive offering period		24 months
Purchase price of common stock		85.00%
Fixed contribution rate		$ 25,000
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares)			151,490	123,889	151,490	123,889
Common stock, capital shares reserved for future issuance (in shares)			1,585,353		1,585,353
Share-based payment arrangement, noncash expense			$ 118,000	$ 72,000	$ 223,000	$ 149,000
Share-based payment arrangement, nonvested award, cost not yet recognized, amount			1,000,000.0		1,000,000.0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, noncash expense			1,478,000	2,117,000	2,833,000	3,631,000
Compensation not yet recognized, stock options			11,100,000		11,100,000
RSAs and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, noncash expense			936,000	$ 1,152,000	1,855,000	$ 2,469,000
Compensation not yet recognized, share-based awards other than options			$ 6,300,000		$ 6,300,000

CODEXIS, INC. 10-Q