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Subsequent events - Down round and exercise of warrants (Details) - $ / shares	1 Months Ended	12 Months Ended
	Jul. 31, 2025	Jun. 30, 2025
Subsequent events
Adjustment on down round feature (in dollars per share)		$ 0.76
Adjustment on down round feature (in shares)		20,061,892
Number of warrant shares exercised on a cashless basis (in shares)		17,586,907
Class A Ordinary Shares
Subsequent events
Number of warrants		7,914,108
Subsequent Events
Subsequent events
Adjustment on down round feature (in dollars per share)	$ 0.3
Adjustment on down round feature (in shares)	12,279,001
Number of warrant shares exercised on a cashless basis (in shares)	16,726,000
Subsequent Events | Class A Ordinary Shares
Subsequent events
Number of warrants	10,399,410

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- Definition

Number of securities into which the class of warrant or right, adjusted due to down round feature during the period.

+ References

No definition available.

+ Details

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- Definition

The exercise price per share or per unit of warrants or rights is adjusted due to the down round feature.

+ References

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- Definition

Number of class of warrant or right exercised on cashless basis.

+ References

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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- 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

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