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Financial assets and liabilities - Summary of Trade and Other Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Jun. 30, 2023
Disclosure Of Financial Assets And Liabilities [Abstract]    
Trade debtors $ 1,804 $ 2,276
Tax incentives recoverable 1,271 2,363
Foreign withholding tax recoverable 471 471
U.S. Tax credits 0 1,473
Net investment in sublease 216 195
Interest receivables 11 18
Other recoverable taxes (Goods and services tax and value-added tax) 225 202
Trade and other receivables $ 3,998 $ 6,998