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Collaborative Arrangements - Additional Information (Detail) | 1 Months Ended
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Aug. 31, 2017
Collaborative Arrangements [Member] |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |
Contractual agreement month and year | 2017-08

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- Definition Contractual agreement month and year. + References No definition available. + Details
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Namespace Prefix: | rkda_
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Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479402/808-10-50-1 + Details
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Balance Type: | na
Period Type: | duration

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- Details
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