v3.3.1.900

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Other Commitments [Line Items] |  |  |
Non-Cancelable operating lease expiration date | 2019 |  |
Non-Cancelable lease agreement for office space, expiration date | Mar. 31, 2020 |  |
Rent expense under lease arrangements | $ 1,002 | $ 717 | $ 734
Employment Agreements [Member] |  |  |
Other Commitments [Line Items] |  |  |
Commitment under contracts | $ 6,300 |  |

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- Definition Capital Leases Expiration Date + References No definition available. + Details
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Namespace Prefix: | arex_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Operating Lease Expiration Date + References No definition available. + Details
Name: | arex_OperatingLeaseExpirationDate
Namespace Prefix: | arex_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 No definition available. + Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_EmploymentContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |