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Description of Business and Basis of Presentation - Additional Information (Detail) - USD ($) |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2025 | Mar. 28, 2025 | May 14, 2024 | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 04, 2024 | May 16, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Place of incorporation |  |  |  |  |  |  |  |  |  | Arizona |  |  |  |
Year of incorporation |  |  |  |  |  |  |  |  |  | 2002 |  |  |  |
Place of reincorporation |  |  |  |  |  |  |  |  |  | Delaware |  |  |  |
Date of reincorporation |  |  |  |  |  |  |  |  |  | 2015-03 |  |  |  |
Accumulated deficit |  |  |  | $ (279,881,000) |  |  |  |  |  | $ (279,881,000) |  | $ (278,878,000) |  |
Cash and cash equivalents |  |  |  | 1,120,000 |  |  |  |  |  | 1,120,000 |  | 4,242,000 |  |
Net losses |  |  |  | 856,000 | $ (4,458,000) | $ 2,599,000 | $ (1,612,000) | $ 1,061,000 | $ (2,423,000) | (1,003,000) | $ (2,974,000) | (7,000,000) |  |
Net cash used in operations |  |  |  |  |  |  |  |  |  | 3,878,000 | 7,418,000 | $ 9,600,000 |  |
Gain from sale of patent portfolio |  | $ 750,000 |  | $ 0 |  |  | $ 0 |  |  | $ 750,000 | $ 4,000,000 |  |  |
Exchange agreement termination date | Aug. 15, 2025 |  |  |  |  |  |  |  |  | May 15, 2025 |  |  |  |
GoodWheat [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on sale of brand |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |
Discontinued Operations [Member] | GoodWheat [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of net consideration |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,700,000
Loss on sale of brand |  |  |  |  |  |  |  | $ 1,500 |  |  |  |  |  |
Collaborative Arrangements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceed from sale of patent portfolio |  |  | $ 4,000,000 |  |  |  |  |  |  |  |  |  |  |
Gain from sale of patent portfolio |  |  |  |  |  |  |  |  |  | $ 4,000,000 |  |  |  |
Limited Partners [Member] | Archipelago Ventures Hawaii, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture interest percentage | 90.00% |  |  |  |  |  |  |  |  |  |  |  | 90.00% |
Bioceres Crop Solutions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |
Proceed from sale of patent portfolio |  | $ 750,000 |  |  |  |  |  |  |  | $ 750,000 |  |  |  |
Arcadia Biosciences, Inc [Member] | Archipelago Ventures Hawaii, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture interest percentage |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |

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