Cash reserve deposit in excess of amount required.

No definition available.

Name:	ATCH_CashReserveDepositInExcessOfAmountRequired
Namespace Prefix:	ATCH_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the cash on deposit in the reserve account less than the amount required in accordance with federal regulations.

+ References

No definition available.

+ Details

Name:	ATCH_CashReserveDepositLessThanAmountRequired
Namespace Prefix:	ATCH_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cash reserve required in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

+ References

No definition available.

+ Details

Name:	ATCH_CashReserveDepositRequired
Namespace Prefix:	ATCH_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cash reserve deposit withdrawn.

+ References

No definition available.

+ Details

Name:	ATCH_CashReserveDepositWithdrawn
Namespace Prefix:	ATCH_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

Name:	us-gaap_CashAndSecuritiesSegregatedUnderFederalAndOtherRegulations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-3
-Number 240
-Section 15c3-3
-Paragraph e
-Subparagraph (1)
-Publisher SEC

+ Details

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

- 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
Balance Type:	na
Period Type:	duration

- Details

Name:	ATCH_CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsAxis=ATCH_CustomersTransactionsAndCreditBalancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ATCH_CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsAxis=ATCH_BrokerDealerTransactionsAndCreditBalancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

CASH SEGREGATED IN ACCORDANCE WITH FEDERAL REGULATIONS (Details Narrative) - USD ($)	Jul. 01, 2026	Jun. 30, 2026	Jul. 01, 2025	Jun. 30, 2025
Customers Transactions and Credit Balances [Member]
Subsequent Event [Line Items]
Calculated required reserve		$ 22,436,492		$ 20,890,603
Cash on deposit in the reserve account		23,376,990		21,175,129
Cash reserve deposit more than amount required		940,498	$ 509,526	284,526
Amount deposited to reserve account in accordance with the rule			$ 225,000
Customers Transactions and Credit Balances [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Cash reserve deposit more than amount required	$ 540,498
Cash reserve deposit withdrawn	400,000
Broker Dealer Transactions and Credit Balances [Member]
Subsequent Event [Line Items]
Calculated required reserve		521,309		100,000
Cash on deposit in the reserve account		378,962		$ 200,575
Cash reserve deposit more than amount required		100,575
Cash reserve deposit more than amount required		$ 142,347
Broker Dealer Transactions and Credit Balances [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Cash reserve deposit more than amount required	100,000
Amount deposited to reserve account in accordance with the rule	$ 242,347