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Fair Value Measurements Using Significant Unobservable Inputs Level 3 (Detail) (USD $)
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2 Months Ended | 3 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2014
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| Beginning balance | $ 6,270,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | |||
| Modification of Warrants | 1,300,170arth_GainOnWarrantDerivativeModification | (1,300,170)arth_GainOnWarrantDerivativeModification | 0arth_GainOnWarrantDerivativeModification | |
| Exercises of Warrants | 224,000arth_GainOnExerciseOfWarrants | 224,000arth_GainOnExerciseOfWarrants | 0arth_GainOnExerciseOfWarrants | |
| Adjustments to estimated fair value | 7,541,693arth_FairValueOfDerivativeLiabilitiesInExcessOfProceeds | 7,541,693arth_FairValueOfDerivativeLiabilitiesInExcessOfProceeds | ||
| Ending balance | 4,593,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | 4,593,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | 6,270,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue | |
| Fair Value, Inputs, Level 3 | ||||
| Beginning balance |
6,270,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
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| Modification of Warrants |
1,300,170arth_GainOnWarrantDerivativeModification / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
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| Exercises of Warrants |
(224,000)arth_GainOnExerciseOfWarrants / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
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| Issuances |
10,391,693us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
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| Adjustments to estimated fair value |
(2,753,170)arth_FairValueOfDerivativeLiabilitiesInExcessOfProceeds / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
(4,121,693)arth_FairValueOfDerivativeLiabilitiesInExcessOfProceeds / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
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| Ending balance |
$ 4,593,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
$ 4,593,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
$ 6,270,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue / dei_LegalEntityAxis = us-gaap_FairValueInputsLevel3Member |
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- Definition
Represents the fair value of derivative liabilities in excess of proceeds No definition available.
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- Definition
Gain on exercise of warrants. No definition available.
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- Definition
Gain on warrant derivative modification. No definition available.
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- Definition
Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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