Income taxes - Additional Information (Detail) £ in Millions |
12 Months Ended | ||
---|---|---|---|
Jun. 30, 2024
USD ($)
|
Jun. 30, 2024
GBP (£)
|
Jun. 30, 2023
USD ($)
|
|
Income Tax Disclosure [Line Items] | |||
Unrecognised tax benefits | $ 0 | $ 0 | |
Deferred tax assets increase decrease in valuation allowance | $ 9,800,000 | $ 14,500,000 | |
Net operating loss description | In general, an ownership change, as defined by Section 382, results from transactions increasing the ownership of 5-percent shareholders in the stock of a corporation by more than 50 percentage points over a three-year period. | In general, an ownership change, as defined by Section 382, results from transactions increasing the ownership of 5-percent shareholders in the stock of a corporation by more than 50 percentage points over a three-year period. | |
Research and development expenses amortization period | 5 years | ||
Threshold percentage set off of annual profits by operating loss carry forward | 80.00% | 80.00% | |
United Kingdom | |||
Income Tax Disclosure [Line Items] | |||
Research and development expenses amortization period | 15 years | ||
Threshold percentage set off of annual profits by operating loss carry forward | 50.00% | 50.00% | |
Threshold operating loss carry forward can be set off | £ | £ 5 | ||
State and Local Jurisdiction [Member] | |||
Income Tax Disclosure [Line Items] | |||
Operating carry forwards description of the expiry period | Certain state net operating loss carryforwards begin to expire in 2038. | Certain state net operating loss carryforwards begin to expire in 2038. | Certain state net operating loss carryforwards begin to expire in 2038. |
Domestic And Foreign [Member] | |||
Income Tax Disclosure [Line Items] | |||
Operating carry forwards description of the expiry period | The UK and federal net operating loss carryforwards have no expiration dates. | The UK and federal net operating loss carryforwards have no expiration dates. | The UK and federal net operating loss carryforwards have no expiration dates. |