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Inventory - Summary of Inventories (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Inventory Disclosure [Abstract] |  |
Raw materials | $ 450 | $ 373
Finished goods | 385 | 660
Inventories | $ 835 | $ 1,033

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- Definition Inventory current and non current net. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Inventory raw materials current and non-current. + References No definition available. + Details
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Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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