Represents the period of investment holding.

No definition available.

Name:	atif_InvestmentHoldingPeriod
Namespace Prefix:	atif_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of interest income on investment in life insurance contract or contracts owned by the Entity.

+ References

No definition available.

+ Details

Name:	atif_LifeInsuranceCorporateOrBankOwnedInterestIncome
Namespace Prefix:	atif_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage, before incentive allocation, of investment income (loss) to average net assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 205
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10342-115837

+ Details

Name:	us-gaap_InvestmentCompanyInvestmentIncomeLossRatioBeforeIncentiveAllocation
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the amount that could be realized under a life insurance contract or contracts owned by the Entity as of the date of the statement of financial position. Such Entity-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

+ 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 210.5-02.12)
-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 325
-SubTopic 30
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6384206&loc=d3e41899-111602

+ Details

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

- 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

Name:	us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=atif_ManulifeInternationalLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

INVESTMENT IN LIFE INSURANCE CONTRACT (Details) $ in Millions		12 Months Ended
	Jul. 29, 2019 HKD ($)	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jul. 29, 2019 USD ($)
INVESTMENT IN LIFE INSURANCE CONTRACT
Investment deposit			$ 1,277,514
Interest income on investment in life insurance contract		$ 95,797
Manulife (International) Limited ("Manulife")
INVESTMENT IN LIFE INSURANCE CONTRACT
Investment deposit	$ 10			$ 1,290,289
Investment holding period	5 years
Minimum \| Manulife (International) Limited ("Manulife")
INVESTMENT IN LIFE INSURANCE CONTRACT
Rates of return (as a percent)	8.69%
Maximum \| Manulife (International) Limited ("Manulife")
INVESTMENT IN LIFE INSURANCE CONTRACT
Rates of return (as a percent)	11.49%
Average \| Manulife (International) Limited ("Manulife")
INVESTMENT IN LIFE INSURANCE CONTRACT
Rates of return (as a percent)	9.48%