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Convertible Notes Payable - Additional Information (Detail) (USD $)
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6 Months Ended |
12 Months Ended |
0 Months Ended |
91 Months Ended |
1 Months Ended |
83 Months Ended |
0 Months Ended |
3 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Sep. 30, 2014
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Sep. 30, 2013
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Mar. 13, 2015
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Sep. 30, 2013
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Jul. 05, 2011
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Jan. 31, 2013
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Mar. 15, 2015
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Mar. 31, 2015
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Apr. 20, 2013
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Sep. 30, 2012
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Mar. 31, 2013
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Oct. 31, 2012
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| Short-term Debt [Line Items] |
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| Proceeds from convertible debt |
$ 750,000us-gaap_ProceedsFromConvertibleDebt
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$ 0us-gaap_ProceedsFromConvertibleDebt
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$ 0us-gaap_ProceedsFromConvertibleDebt
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$ 250,000us-gaap_ProceedsFromConvertibleDebt
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| Debt instrument, interest rate, stated percentage |
8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
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8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
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8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
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| Convertible preferred stock, value, upon closing of preferred equity financing |
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1,000,000arth_ConvertiblePreferredStockValueUponClosingOfPreferredEquityFinancing
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| Convertible notes, total aggregate principal balance |
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1,880,000us-gaap_DebtInstrumentCarryingAmount
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| Convertible Notes Payable Related Parties Current |
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105,000arth_ConvertibleNotesPayableRelatedPartiesCurrent
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| Related Parties [Member] |
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| Short-term Debt [Line Items] |
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| Matured Convertible Notes |
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50,000arth_MaturedConvertibleNotes
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_RelatedPartiesMember
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55,000arth_MaturedConvertibleNotes
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_RelatedPartiesMember
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| Subscription Agreement [Member] |
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| Short-term Debt [Line Items] |
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| Debt Conversion, Description |
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either (a) converted into shares of the Company’s common stock, $0.001 par value per share (“Common Stock”) or (b) the outstanding principal and accrued interest on the Notes is paid in full by the Company. Interest on the Notes becomes due and payable upon their conversion or the Stated Maturity Date and may become due and payable upon the occurrence of an event of default under the Notes. The Notes contain customary events of default, which include, among other things, (i) the Company’s failure to pay other indebtedness of $100,000 or more within the specified cure period for such breach; (iii) the acceleration of the stated maturity of such indebtedness; (iii) the insolvency of the Company; and (iv) the receipt of final, non-appealable judgments in the aggregate amount of $100,000 or more.
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| Minimum |
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| Short-term Debt [Line Items] |
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| Percentage of principle balance of notes on conversion price of notes |
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6.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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10.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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10.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
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| Maximum |
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| Short-term Debt [Line Items] |
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| Percentage of principle balance of notes on conversion price of notes |
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10.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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50.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
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| Convertible Notes Payable |
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| Short-term Debt [Line Items] |
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| Proceeds from convertible debt |
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250,000us-gaap_ProceedsFromConvertibleDebt
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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1,735,000us-gaap_ProceedsFromConvertibleDebt
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt instrument, interest rate, stated percentage |
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6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible preferred stock, value, upon closing of preferred equity financing |
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1,000,000arth_ConvertiblePreferredStockValueUponClosingOfPreferredEquityFinancing
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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750,000arth_ConvertiblePreferredStockValueUponClosingOfPreferredEquityFinancing
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Matured Convertible Notes |
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1,245,000arth_MaturedConvertibleNotes
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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50,000arth_MaturedConvertibleNotes
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable Related Parties Current |
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1,345,000arth_ConvertibleNotesPayableRelatedPartiesCurrent
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt Instrument, Convertible, Conversion Price |
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0.20us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt Instrument, Interest Rate, Effective Percentage |
8.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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8.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Other Notes Payable |
100,000us-gaap_OtherNotesPayable
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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100,000us-gaap_OtherNotesPayable
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable | Related Parties [Member] |
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| Short-term Debt [Line Items] |
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| Convertible notes, total aggregate principal balance |
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1,880,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_RelatedPartiesMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable | Subscription Agreement [Member] |
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| Short-term Debt [Line Items] |
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| Debt instrument, interest rate, stated percentage |
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8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt Instrument, Face Amount |
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750,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt Instrument, Maturity Date |
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Mar. 13, 2016
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| Debt Instrument, Convertible, Conversion Price |
$ 0.001us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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$ 0.001us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Other Noncash Expense |
92,857us-gaap_OtherNoncashExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable | Subscription Agreement [Member] | Derivative [Member] |
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| Short-term Debt [Line Items] |
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| Derivative Liability, Fair Value, Amount Not Offset Against Collateral |
262,131us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DerivativeMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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354,988us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DerivativeMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
|
262,131us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DerivativeMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Proceeds from Issuance of Debt |
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395,012us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DerivativeMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Other Noncash Expense |
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92,857us-gaap_OtherNoncashExpense
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_DerivativeMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_SubscriptionAgreementMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable | investors [Member] |
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| Short-term Debt [Line Items] |
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| Debt Instrument, Face Amount |
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250,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= arth_InvestorsMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable | Minimum |
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| Short-term Debt [Line Items] |
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| Debt instrument, interest rate, stated percentage |
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0.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Percentage of principle balance of notes on conversion price of notes |
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6.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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10.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger |
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4.99%us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Convertible Notes Payable | Maximum |
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| Short-term Debt [Line Items] |
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| Debt instrument, interest rate, stated percentage |
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0.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Percentage of principle balance of notes on conversion price of notes |
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50.00%arth_PercentageOfPrincipleBalanceOfNotesOnConversionPriceOfNotes
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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| Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger |
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9.99%us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_ConvertibleNotesPayableMember
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