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Subsequent events - Additional Information (Detail) - Aug. 11, 2022 - ATM Financing Facility [Member]
$ / shares in Units, $ in Thousands, $ in Thousands
USD ($)
shares
AUD ($)
$ / shares
shares
Cash flows from (used in) financing activities [abstract]    
Proceed from financing facility $ 2,530 $ 3,670
Weighted average share price | $ / shares   $ 0.005
Number of shares outstanding | shares 149,636,656 149,636,656
Percentage Of Day Trading Volume 5.00% 5.00%