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Income Taxes - Additional Information (Detail) (USD $)
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12 Months Ended | |
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Sep. 30, 2014
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Sep. 30, 2013
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| Income Taxes [Line Items] | ||
| Deferred Tax Assets, Operating Loss Carryforwards, Domestic | $ 6,230,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | $ 3,486,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic |
| Research and experimentation credit carryforwards | 63,368us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch | 32,559us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch |
| Deferred tax assets, operating loss carryforwards, state and local | 5,271,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 2,800,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal |
| Valuation allowance, deferred tax asset, change in amount | 2,202,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 589,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |
| Expire In 2023 | ||
| Income Taxes [Line Items] | ||
| Research and experimentation credit carryforwards |
19,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / arth_OperatingLossCarryforwardsExpirationPeriodAxis = arth_ExpireInTwoThousandAndTwentyThreeMember |
10,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / arth_OperatingLossCarryforwardsExpirationPeriodAxis = arth_ExpireInTwoThousandAndTwentyThreeMember |
| Expire in 2029 | ||
| Income Taxes [Line Items] | ||
| Research and experimentation credit carryforwards |
$ 44,112us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / arth_OperatingLossCarryforwardsExpirationPeriodAxis = arth_ExpireIn2029Member |
$ 32,559us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / arth_OperatingLossCarryforwardsExpirationPeriodAxis = arth_ExpireIn2029Member |
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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