Represents the business combination of liquidation pay.

No definition available.

Name:	artc_BusinessCombinationOfLiquidationPay
Namespace Prefix:	artc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of deferred commissions.

+ References

No definition available.

+ Details

Name:	artc_PercentageOfDeferredCommissions
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Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

The cash inflow associated with the amount received from entity's first offering of stock to generating gross proceeds.

+ References

No definition available.

+ Details

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

- Definition

Number of purchased of shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	artc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Units issued during period shares new issues.

+ References

No definition available.

+ Details

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Namespace Prefix:	artc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
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- Definition

Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of general and administrative expense classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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

- Definition

Value of forfeited shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
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Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Subsequent Events (Details) - USD ($)						4 Months Ended
Subsequent Events (Details) - USD ($)	Jan. 26, 2026	Jan. 24, 2026	Jan. 07, 2026	Jan. 06, 2026	Jan. 05, 2026	Dec. 31, 2025
Subsequent Event [Line Items]
Price per unit						$ 0.4
Sale of unit						4,400,000
Percentage of deferred commissions						75.00%
IPO [Member]
Subsequent Event [Line Items]
Price per unit						$ 0.2
Gross proceeds						$ 22,000,000
Sale of unit						8,800,000
Private Placement [Member]
Subsequent Event [Line Items]
Price per unit						$ 10
Over-Allotment Option [Member]
Subsequent Event [Line Items]
Number of units issued						3,300,000
Price per unit						$ 0.6
Gross proceeds						$ 1,980,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Administrative and shared personnel support					$ 30,000
Gross proceeds		$ 33,000,000
Business combination of liquidation pay				$ 12,500
Promissory note			$ 194,453
Subsequent Event [Member] \| IPO [Member]
Subsequent Event [Line Items]
Number of units issued			22,000,000
Price per unit			$ 10
Gross proceeds	$ 253,000,000		$ 220,000,000
Sale of unit		253,000,000
Generating gross proceeds			$ 220,000,000
Subsequent Event [Member] \| Private Placement [Member]
Subsequent Event [Line Items]
Number of units issued			825,000
Price per unit			$ 10
Sale of unit			825,000
Purchased of shares			295,000
Generating gross proceeds			$ 8,250,000
Subsequent Event [Member] \| Over-Allotment Option [Member]
Subsequent Event [Line Items]
Number of units issued	3,300,000	3,300,000
Forfeiture shares		$ 1,100,000
Subsequent Event [Member] \| Sponsor [Member]
Subsequent Event [Line Items]
Purchased of shares			530,000