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Financial risk management - Additional Information (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Jun. 30, 2023
Disclosure of Financial Risk Management [Line Items] |  |
Percentage of forecast net sales | 20.00% |
Non-cancellable purchase commitments related to raw materials, manufacturing agreements and other goods and services | $ 5,700,000 |
Other purchase commitments | 0 |
Manufacturing Service Agreement |  |
Disclosure of Financial Risk Management [Line Items] |  |
Minimum financial commitment reduction amount | 7,400,000 |
Minimum financial commitment reduction amount on lease component | 1,500,000 |
Minimum financial commitment reduction amount on non lease component | 5,900,000 |
Lonza Bioscience Singapore Pte. Ltd | Manufacturing Service Agreement |  |
Disclosure of Financial Risk Management [Line Items] |  |
Minimum remaining financial commitment of non-lease component on exercise of option to extend non-cancellable term | 12,700,000 |
Minimum financial commitment of lease component on exercise of option to extend non-cancellable term | $ 2,500,000 |
Interest Rate Risk |  |
Disclosure of Financial Risk Management [Line Items] |  |
Effect on profit from change in interest rates | 10.00% | 10.00%
Liquidity Risk |  |
Disclosure of Financial Risk Management [Line Items] |  |
Non interest bearing financial liabilities maturity period | 6 months | 6 months
USD | Currency Risk |  |
Disclosure of Financial Risk Management [Line Items] |  |
Percentage of cash held | 68.00% | 67.00%
AUD | Currency Risk |  |
Disclosure of Financial Risk Management [Line Items] |  |
Percentage of cash held | 31.00% | 33.00%
Other Currency | Currency Risk |  |
Disclosure of Financial Risk Management [Line Items] |  |
Percentage of cash held | 1.00% |

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