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

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

Name:	us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Description of stock transaction which may include details of the offering (IPO, private placement), a description of the stock sold, percentage of subsidiary's or equity investee's stock sold, a description of the investors and whether the stock was issued in a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 23
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481231/810-10-45-23

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1A

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-SubTopic 10
-Topic 810
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1B

+ Details

Name:	us-gaap_SaleOfStockDescriptionOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
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

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

- Details

Name:	us-gaap_StatementEquityComponentsAxis=ATMC_PrivateWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ATMC_SponsorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_TitleOfIndividualAxis=ATMC_SponsorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Private Placement (Details Narrative) - USD ($)						3 Months Ended
Private Placement (Details Narrative) - USD ($)	Jan. 09, 2023	Jan. 06, 2023	Jan. 04, 2023	Jan. 03, 2023	Jan. 08, 2022	Mar. 31, 2024	Mar. 31, 2023
Number of private units sold, shares			115,500
Proceeds from sale of private units							$ 4,092,000
Units description				The Founder Shares and Private Units (and underlying securities) will not, subject to certain exceptions, be transferred, assigned, sold or released from escrow in the case of (i) 50% of the Founder Shares and Private Units (and underlying securities) until the earlier to occur of: (A) six months after the date of the consummation of our initial business combination, or (B) the date on which the closing price of our ordinary shares equals or exceeds $12.50 per share (as adjusted for share splits, share dividends, reorganizations and recapitalizations) for any 20 trading days within any 30-trading day period commencing after our initial business combination and (ii) the remaining 50% of the Founder Shares and Private Units (and underlying securities) until six months after the date of the consummation of our initial business combination, or earlier, in either case, if, subsequent to our initial business combination, we consummate a subsequent liquidation, merger, stock exchange or other similar transaction which results in all of our shareholders having the right to exchange their shares for cash, securities or other property
Private Warrant [Member]
Sale of stock, price per share			$ 11.50
Sponsor [Member]
Number of private units sold, shares		17,325			287,500
Sale of stock, price per share		$ 2.00
Private Placement [Member] \| Sponsor [Member]
Number of private units sold, shares	38,700	38,700	370,500
Sale of stock, price per share	$ 10.00		$ 10.00
Proceeds from sale of private units	$ 387,000		$ 3,705,000
Private Placement [Member] \| Sponsor [Member]
Number of private units sold, shares			370,500
Sale of stock, price per share			$ 10.00
Units description			Each whole Private Placement Unit will consist of one ordinary share (“Private Share”), one warrant (“Private Warrant”) and one right (“Private Right”) entitling the holder thereof to receive one-tenth of one Private Share upon the completion of an Initial Business Combination