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Other receivables, net - Movements of allowance for credit losses (Details) - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Movements of allowance for credit losses
Beginning balance	$ 2,972,289	$ 2,582,761
Addition	13,875	389,528	$ 2,582,761
Write-off	(2,582,761)	0	0
Ending balance	$ 403,403	$ 2,972,289	$ 2,582,761

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	btog_OtherReceivableAllowanceForCreditLossRollForward
Namespace Prefix:	btog_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of direct write-downs of other receivable charged against the allowance.

+ References

No definition available.

+ Details

Name:	btog_OtherReceivableAllowanceForCreditLossWriteoff
Namespace Prefix:	btog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of expense (reversal of expense) for expected credit loss on other receivable.

+ References

No definition available.

+ Details

Name:	btog_OtherReceivableCreditLossExpenseReversal
Namespace Prefix:	btog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of allowance for credit loss on receivable, classified as other and current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant