Amount of allowance for tenant improvements receivable.

No definition available.

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Balance Type:	debit
Period Type:	instant

- Definition

Annual increase in rent percentage.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of annual base rent for operating lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	armp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced.

+ References

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Balance Type:	debit
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Discount rate used by lessee to determine present value of operating lease payments.

+ References

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-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
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Period Type:	instant

- Definition

Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

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- Definition

Amount of cash outflow for variable lease payment excluded from lease liability.

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- Details

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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Oct. 28, 2021
Lessee, Lease, Description [Line Items]
Annual increase in rent percentage	3.00%
Standby letter of credit	$ 4.0			$ 5.0
Lease term				16 years
Allowance for tenant improvements				$ 7.2
Rent expense under operating leases	$ 1.8	$ 2.0
Variable lease payment		$ 0.3
Impairment expense			$ 5.4
Discount rate	21.60%
Minimum
Lessee, Lease, Description [Line Items]
Annual base rent for operating lease	$ 1.9
Maximum
Lessee, Lease, Description [Line Items]
Annual base rent for operating lease	$ 2.5