v3.25.4

Investments Accounted for Using Equity Method (Details) - HKD ($)	Aug. 21, 2025	Nov. 15, 2024
Investments Accounted for Using Equity Method [Line Items]
Percentage shares of joint ventures		60.00%
Alpha DeepMind [Member]
Investments Accounted for Using Equity Method [Line Items]
Subscription shares	1,110
Mr. Choy Kwan Yin [Member]
Investments Accounted for Using Equity Method [Line Items]
Subscription price value	$ 500,000

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- References

No definition available.

+ Details

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Namespace Prefix:	atgl_
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X

- Definition

Represents the percentage of joint ventures shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	atgl_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Subscription price value.

+ References

No definition available.

+ Details

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

X

- Definition

Subscription shares.

+ References

No definition available.

+ Details

Name:	atgl_SubscriptionShares
Namespace Prefix:	atgl_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: