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Share-based payments - Additional Information (Detail) | 12 Months Ended
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Jun. 30, 2021 shares | Jun. 30, 2021 AUD ($) shares | Jun. 30, 2021 shares | Jun. 30, 2021 shares | Jun. 30, 2020 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Employee remuneration expense | $ |  | $ 636,383 |  |  |
Weighted average remaining contractual life of outstanding share options | 2 years 7 months 6 days |  |  |  | 2 years 9 months 10 days
Number of options issued to employees |  |  | 2,200,000 | 2,200,000 | 250,000
Tranche 9 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of Options vested |  |  |  | 1,000,000 |
Number of options issued | 1,200,000 | 1,200,000 | 1,200,000 | 1,200,000 |
Other Tranche One [Member] | Bottom of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of Options vested |  |  |  |  | 9
Other Tranche One [Member] | Top of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of Options vested |  |  |  |  | 75.00%
Other Tranche Two [Member] | Bottom of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of Options vested |  |  |  |  | 12
Other Tranche Two [Member] | Top of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of Options vested |  |  |  |  | 50.00%
Other Tranche Three [Member] | Bottom of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of Options vested |  |  |  |  | 14
Other Tranche Three [Member] | Top of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of Options vested |  |  |  |  | 50.00%
Other Tranche Four [Member] | Bottom of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of Options vested |  |  |  |  | 15
Other Tranche Four [Member] | Top of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of Options vested |  |  |  |  | 67.00%
Tranches 2 and 8 [Member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of Options vested |  |  | 53.00% |  |
Tranches 10 and 12 [Member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of Options vested |  |  | 25.00% |  |

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- Definition The amount of expense from share-based payment transactions with employees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2020-01-01 + Details
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