Term of warrant.

No definition available.

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Namespace Prefix:	armp_
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Balance Type:	na
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- Definition

Represents the terms related with expiration of warrants.

+ References

No definition available.

+ Details

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Namespace Prefix:	armp_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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- Details

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- Details

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- Details

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Stockholders Equity (Summary of Warrants Outstanding) (Details) - USD ($) $ / shares in Units, $ in Millions				2 Months Ended	3 Months Ended
	Jan. 26, 2021	Mar. 27, 2020	Feb. 12, 2020	Mar. 27, 2020	Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					16,647,219
Term of warrant					5 years
Exercise Price $21.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					597,881
Exercise Price					$ 21.00
Warrant Expiration Date					May 10, 2022
Exercise Price $5.60 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					1,183,491
Exercise Price					$ 5.60
Warrant Expiration Date					Oct. 16, 2023
Exercise Price $2.87 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					993,139
Exercise Price					$ 2.87
Warrant Expiration Date					Feb. 12, 2025
Exercise Price $2.87 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					7,717,661
Exercise Price					$ 2.87
Warrant Expiration Date					Mar. 27, 2025
Exercise Price $1,680.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					1,200
Exercise Price					$ 1,680.00
Exercise Price $3.25 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					1,867,912
Exercise Price					$ 3.25
Warrant Expiration Date					Jan. 25, 2026
Exercise Price $3.25 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants					4,285,935
Exercise Price					$ 3.25
Warrant Expiration Date					Mar. 17, 2026
Common Stock Subject to Mandatory Redemption [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued, Price Per Share	$ 3.25
Securities Purchase Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, New Issues		7,717,661	993,139
Proceeds from issuance of private placement		$ 22.2	$ 2.8	$ 25.0
Securities Purchase Agreement [Member] \| Common Stock Subject to Mandatory Redemption [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued, Price Per Share	$ 3.25	$ 2.87		$ 2.87
Stock Issued During Period, Shares, New Issues	6,153,847			8,710,800
Securities Purchase Agreement [Member] \| Warrants and Rights Subject to Mandatory Redemption [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	6,153,847	8,710,800		8,710,800