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Financial assets and liabilities - Additional Information (Details) - USD ($) |  |  |  |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 05, 2024 | Mar. 08, 2023 | Dec. 22, 2022 | Nov. 19, 2021 | Jun. 29, 2018 | Nov. 30, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2023
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | $ 115,762,000 |  | $ 108,763,000
Issuance warrants exercised period |  |  |  |  |  |  | 7 years |  |
Financial assets |  |  |  |  |  |  | $ 84,619,000 |  | 82,399,000
Financial liabilities |  |  |  |  |  |  | 145,050,000 |  | 151,533,000
Warrants fair value at issue date |  |  |  |  |  |  | 1,000,000 |  | $ 5,400,000
Gain (loss) on remeasurement of warrant liability |  |  |  |  |  |  | $ (4,400,000) | $ (700,000) |
Level 3 | Unlisted Equity Securities |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Percentage of assets measured at fair value |  |  |  |  |  |  | 100.00% |  | 100.00%
Gross debt - fixed interest rates |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  | $ 121,999,000 |  | $ 116,495,000
American Depositary Shares | Potential Ordinary Share Transactions |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Outstanding common share capital, percentage | 1000.00% |  |  |  |  |  |  |  |
American Depository Receipt | Potential Ordinary Share Transactions |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Outstanding common share capital, percentage | 500.00% |  |  |  |  |  |  |  |
Borrowings - Oaktree |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings principal amount |  |  |  |  |  | $ 90,000,000 |  |  |
Borrowings term |  |  |  |  |  | 5 years |  |  |
Borrowings |  |  |  | $ 60,000,000 |  |  |  |  |
Borrowings, Interest Only Period |  |  |  |  |  | 3 years |  |  |
Borrowings, interest rate |  |  |  |  |  | 9.75% |  |  |
Percentage of principal amount payable over two year |  |  |  |  |  | 40.00% |  |  |
Amortization period |  |  |  |  |  | 2 years |  |  |
Unpaid Interest Portion Per Annum |  |  |  |  |  | 1.75% |  |  |
Percentage of premium for volume-weighted average price |  |  | 15.00% | 15.00% |  |  |  |  |
Issuance warrants exercised period |  | 7 years |  | 7 years |  |  |  |  |
Remeasurement of borrowing arrangements within finance gains (loss) |  |  |  |  |  |  |  | (1,400,000) |
Finance costs loss on remeasurement due to additional warrants issued |  |  |  |  |  |  |  | 1,000,000 |
Finance costs loss on adjustment of carrying amount on financial liability |  |  |  |  |  |  |  | $ 400,000 |
Borrowings - Oaktree | Refinancing and Expansion of Senior Debt Facility |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Percentage of share premium price |  |  |  |  |  |  |  | 15.00% |
Warrant exercise term |  | 7 years |  |  |  |  |  |  |
Borrowings - Oaktree | American Depositary Shares |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Exercise price (in australian dollars per share) |  |  | $ 3.70 | $ 7.26 |  | $ 7.26 |  | $ 3.70 |
Borrowings - Oaktree | American Depositary Shares | Potential Ordinary Share Transactions |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Exercise price (in australian dollars per share) | $ 14.36 |  |  |  |  |  |  |  |
Borrowings - Oaktree | American Depositary Shares | Refinancing and Expansion of Senior Debt Facility |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Exercise price (in australian dollars per share) |  |  |  |  |  |  |  | $ 3.70 |
Borrowings - Oaktree | Warrants |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Number of warrants granted to purchase american depositary shares (in shares) |  |  | 455,000 | 1,769,669 |  |  |  |  |
Borrowings - Oaktree | Warrants | Refinancing and Expansion of Senior Debt Facility |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Number of warrants granted to purchase american depositary shares (in shares) |  |  |  |  |  |  |  | 455,000 |
Borrowings - Oaktree | November 2021 warrants |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Number of warrants issued to purchase american depositary shares |  |  |  |  |  | 1,769,669 |  |  |
Borrowings - Oaktree | November 2021 warrants | Potential Ordinary Share Transactions |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Number of warrants issued to purchase american depositary shares | 884,838 |  |  |  |  | 884,838 |  |  |
Borrowings - Oaktree | December 2022 warrants |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Number of warrants issued to purchase american depositary shares |  |  |  |  |  |  |  | 455,000 |
Borrowings - Oaktree | December 2022 warrants | Potential Ordinary Share Transactions |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Number of warrants issued to purchase american depositary shares | 227,502 |  |  |  |  |  |  |  |
Borrowings - Oaktree | December 2022 warrants | American Depositary Shares | Potential Ordinary Share Transactions |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Exercise price (in australian dollars per share) | $ 7.24 |  |  |  |  |  |  |  |
Borrowings - Oaktree | Tranche One |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  |  | $ 60,000,000 |  | $ 60,000,000 | 30,000,000 |  |
Borrowings, interest rate |  |  |  |  |  | 9.75% |  |  |
Borrowings - Oaktree | Quarterly Payments |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  |  |  |  |  | 8.00% |  |  |
Borrowings - NovaQuest |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Remeasurement of borrowing arrangements within finance gains (loss) |  |  |  |  |  |  | (100,000) | $ 200,000 |
Percentage of entity's revenue, annual payment cap threshold |  |  |  |  | 25.00% |  |  |  |
Borrowings - NovaQuest | Level 2 |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  | 0 |  | 0
Financial liabilities |  |  |  |  |  |  | 0 |  | 0
Borrowings - NovaQuest | Level 1 |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  | 0 |  | 0
Financial liabilities |  |  |  |  |  |  | $ 0 |  | $ 0
Borrowings - NovaQuest | Gross debt - fixed interest rates |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings principal amount |  |  |  |  | $ 40,000,000 |  |  |  |
Borrowings term |  |  |  |  | 8 years |  |  |  |
Borrowings, Interest Only Period |  |  |  |  | 4 years |  |  |  |
Borrowings, interest rate |  |  |  |  | 15.00% |  |  |  |
Borrowings - NovaQuest | Contingent Consideration Provision | Level 3 |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Percentage of liabilities measured at fair value |  |  |  |  |  |  | 100.00% |  | 100.00%
Borrowings - NovaQuest | Tranche One | Gross debt - fixed interest rates |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  | $ 30,000,000 |  |  |  |
Borrowings - NovaQuest | Tranche Two | Gross debt - fixed interest rates |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  | $ 10,000,000 |  |  |  |
Oaktree Capital Management |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Minimum unrestricted cash balance |  |  |  |  |  |  | $ 35,000,000 |  |
Top of Range |  |  |  |  |  |  |  |  |
Disclosure Of Financial Assets And Liabilities [Line Items] |  |  |  |  |  |  |  |  |
Trade receivables settlement period |  |  |  |  |  |  | 60 days |  |

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