XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.23.1

Equity Financing - Additional Information (Detail) - USD ($) |  |  | 1 Months Ended | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 06, 2023 | Aug. 16, 2022 | Mar. 31, 2023 | Aug. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Jan. 31, 2021 | Dec. 31, 2020 | Jul. 31, 2020 | May 31, 2020 | Sep. 30, 2019
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Change in fair value of common stock warrant and option liabilities |  |  |  |  | $ 940,000 | $ 0 |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance, aggregate offering prices |  |  |  |  | 50,000,000.0 |  |  |  |  |  |
Common Stock and Pre-Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Remaining offering costs allocated to common stock and offset to additional paid in capital | $ 330,000 | $ 365,000 |  |  |  |  |  |  |  |  |
August 2022 Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued |  |  |  | 61,250 |  |  |  |  |  |  |
Offering closing period |  |  |  | Aug. 16, 2022 |  |  |  |  |  |  |
August 2022 Purchase Agreement [Member] | Pre Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrant issued, shares of common stock called by warrant |  |  |  | 56,813 |  |  |  |  |  |  |
Warrants issued, exercise price |  |  |  | $ 0.004 |  |  |  |  |  |  |
August 2022 Purchase Agreement [Member] | Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued |  |  |  | 118,063 |  |  |  |  |  |  |
Exercise price |  |  |  | $ 37.35 |  |  |  |  |  |  |
Proceeds from issuance of common stock, pre-funded warrants and preferred investment options from March 2023 PIPE |  |  |  | $ 5,000,000.0 |  |  |  |  |  |  |
Warrants expiration period |  |  |  | 5 years |  |  |  |  |  |  |
March 2023 Placement Agent Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Issuance costs allocated to liability preferred options | $ 430,000 |  |  |  |  |  |  |  |  |  |
March 2023 Options and March 2023 Placement Agent Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expected volatility | 128.55% |  |  |  |  |  |  |  |  |  |
Stock price | $ 7.61 |  |  |  |  |  |  |  |  |  |
Risk-free interest rate | 4.27% |  |  |  |  |  |  |  |  |  |
March 2023 Options and March 2023 Placement Agent Options [Member] | Series B Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expected volatility | 103.33% |  |  |  |  |  |  |  |  |  |
Stock price | $ 7.61 |  |  |  |  |  |  |  |  |  |
Risk-free interest rate | 4.97% |  |  |  |  |  |  |  |  |  |
August 2022 Options and August 2022 Placement Agent Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  | 128.46% |  |  |  |  |  |  |  |  |
Stock price |  | $ 37.60 |  |  |  |  |  |  |  |  |
Risk-free interest rate |  | 2.97% |  |  |  |  |  |  |  |  |
Expected term |  | 5 years |  |  |  |  |  |  |  |  |
August 2022 Placement Agent Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value assumptions, value |  | $ 191,000 |  |  |  |  |  |  |  |  |
Offering costs |  | 488,000 |  |  |  |  |  |  |  |  |
Issuance costs allocated to liability preferred options |  | 314,000 |  |  |  |  |  |  |  |  |
August 2022 Placement Agent Options [Member] | Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Offering costs |  | $ 679,000 |  |  |  |  |  |  |  |  |
August 2022 Placement Agent Options [Member] | August 2022 Purchase Agreement [Member] | Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrant issued, shares of common stock called by warrant |  |  |  | 5,904 |  |  |  |  |  |  |
Warrants issued, exercise price |  |  |  | $ 52.80 |  |  |  |  |  |  |
Warrant, exercisable term |  |  |  | 5 years |  |  |  |  |  |  |
March 2023 Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated fair value of liability options | $ 6,600,000 |  |  |  |  |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued |  |  | 165,500 |  |  |  |  |  |  |  |
Offering costs |  |  |  |  | $ 548,000 |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Series A Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued |  |  | 666,334 |  |  |  |  |  |  |  |
Exercise price |  |  | $ 9.00 |  | $ 9.00 |  |  |  |  |  |
Options expiration period |  |  | 5 years |  |  |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Series A and B Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued |  |  | 666,334 |  |  |  |  |  |  |  |
Exercise price |  |  | $ 9.00 |  | $ 9.00 |  |  |  |  |  |
Proceeds from issuance of common stock and warrants gross |  |  |  |  | $ 6,000,000.0 |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Series B Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Options expiration period |  |  | 1 year 6 months |  |  |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Pre Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrant issued, shares of common stock called by warrant |  |  | 500,834 |  | 500,834 |  |  |  |  |  |
Warrants issued, exercise price |  |  | $ 0.0001 |  | $ 0.0001 |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Purchase Agreement [Member] | Common Stock and Pre-Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value of common stock and pre-funded warrants | 5,100,000 |  |  |  |  |  |  |  |  |  |
March 2023 Private Placement [Member] | Option Amendment Agreements [Member] | Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrant issued, shares of common stock called by warrant |  |  | 178,132 |  | 178,132 |  |  |  |  |  |
March 2023 Private Placement [Member] | Option Amendment Agreements [Member] | Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrants issued, exercise price |  |  | $ 9.00 | $ 37.35 | $ 9.00 |  | $ 125.20 | $ 120.00 | $ 154.00 | $ 191.00 | $ 300.80
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | Preferred Investment Options [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares of common stock issued |  |  | 33,317 |  |  |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | March 2023 Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock options issued to placement agent and included in offering costs |  |  |  |  | $ 212,000 |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | March 2023 Purchase Agreement [Member] | Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrant modification included in valuation loss |  |  |  |  | $ 404,000 |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Placement Agent Options [Member] | Option Amendment Agreements [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Exercise price |  |  | $ 11.25 |  | $ 11.25 |  |  |  |  |  |
Warrant, exercisable term |  |  |  |  | 5 years |  |  |  |  |  |
March 2023 Private Placement [Member] | August 2022 Placement Agent Options [Member] | August 2022 Purchase Agreement [Member] | Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Warrant modification included in valuation loss |  |  |  |  | $ 185,000 |  |  |  |  |  |
March 2023 Private Placement [Member] | March 2023 Options [Member] | March 2023 Purchase Agreement [Member] | Common Stock and Pre-Funded Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Class Of Warrant Or Right [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated fair value, loss | $ 5,700,000 |  |  |  |  |  |  |  |  |  |

X
- Definition Change in fair value of common stock warrant and option liabilities. + References No definition available. + Details
Name: | rkda_ChangeInFairValueOfCommonStockWarrantAndOptionLiabilities
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Class of warrant or right exercisable term. + References No definition available. + Details
Name: | rkda_ClassOfWarrantOrRightExercisableTerm
Namespace Prefix: | rkda_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common stock options issued to placement agent and included in offering costs. + References No definition available. + Details
Name: | rkda_CommonStockOptionsIssuedToPlacementAgentAndIncludedInOfferingCosts
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Estimated fair value of liability options. + References No definition available. + Details
Name: | rkda_EstimatedFairValueOfLiabilityOptions
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Estimated fair value options exceeded gross proceeds. + References No definition available. + Details
Name: | rkda_EstimatedFairValueOptionsExceededGrossProceeds
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of common stock and pre-funded warrants. + References No definition available. + Details
Name: | rkda_FairValueOfCommonStockAndPreFundedWarrants
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Issuance costs allocated to liability preferred options. + References No definition available. + Details
Name: | rkda_IssuanceCostsAllocatedToLiabilityPreferredOptions
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Offering closing period. + References No definition available. + Details
Name: | rkda_OfferingClosingPeriod
Namespace Prefix: | rkda_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Options expiration period. + References No definition available. + Details
Name: | rkda_OptionsExpirationPeriod
Namespace Prefix: | rkda_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from issuance of common stock and warrants gross. + References No definition available. + Details
Name: | rkda_ProceedsFromIssuanceOfCommonStockAndWarrantsGross
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds from issuance of common stock pre-funded warrants and preferred investment options. + References No definition available. + Details
Name: | rkda_ProceedsFromIssuanceOfCommonStockPreFundedWarrantsAndPreferredInvestmentOptions
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-based compensation arrangement by share-based payment award, fair value assumptions, value. + References No definition available. + Details
Name: | rkda_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsValue
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Warrant modification included in valuation loss. + References No definition available. + Details
Name: | rkda_WarrantModificationIncludedInValuationLoss
Namespace Prefix: | rkda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Warrants expiration period. + References No definition available. + Details
Name: | rkda_WarrantsExpirationPeriod
Namespace Prefix: | rkda_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- 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 No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfStockIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceInitialPublicOffering
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=rkda_CommonStockAndPreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecuritiesFinancingTransactionAxis=rkda_AugustTwoThousandAndTwentyTwoPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=rkda_PreFundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=rkda_PreferredInvestmentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=rkda_MarchTwoThousandTwentyThreePlacementAgentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=rkda_MarchTwoThousandTwentyThreeOptionsAndMarchTwoThousandTwentyThreePlacementAgentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=rkda_SeriesBPreferredInvestmentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=rkda_AugustTwoThousandTwentyTwoOptionsAndAugustTwoThousandTwentyTwoPlacementAgentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=rkda_AugustTwoThousandTwentyTwoPlacementAgentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=rkda_MarchTwoThousandTwentyThreeOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=rkda_MarchTwoThousandTwentyThreePrivatePlacementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SecuritiesFinancingTransactionAxis=rkda_MarchTwoThousandTwentyThreeSecuritiesPurchasePurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=rkda_SeriesAPreferredInvestmentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=rkda_SeriesAAndBPreferredInvestmentOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=rkda_OptionAmendmentAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |