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Assets Held For Sale (Details) $ in Millions | 1 Months Ended |
--- | --- | ---
May 31, 2019 item | Sep. 30, 2019 USD ($)
Assets Held For Sale [Abstract] |  |
Number of manufacturing sites | item | 2 |
Net assets value | $ |  | $ 0.6

X
- Definition Number of manufacturing sites held for sale. + References No definition available. + Details
Name: | armp_AssetsHeldForSaleNumberOfManufacturingSites
Namespace Prefix: | armp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net asset value of the assets held for sale. + References No definition available. + Details
Name: | armp_NetAssetsAmountHeldForSale
Namespace Prefix: | armp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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