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Significant accounting policies - Additional Information (Detail) - AUD ($) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Consolidated loss after income tax | $ 6,039,000 | $ 10,670,000 | $ 12,155,000 |
Net current asset position | 5,372,114 | 14,096,234 |  |
Net cash outflows from operating activities | 8,661,000 | 11,435,000 | 11,980,000 |
Consolidated cash in hand and at bank | 5,956,000 | 14,455,000 | $ 33,453,000 | $ 44,371,000
Current assets | 9,260,000 | $ 19,480,000 |  |
Excess value of share | $ 4,000,000 |  |  |
Research and development tax incentive program [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Additional tax deduction percentage | 43.50% |  |  |
Bottom of range [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Trade receivables settlement period | 30 days |  |  |
Overdue period where trade receivables may be impaired | 120 days |  |  |
Top of range [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Trade receivables settlement period | 60 days |  |  |
Trade and other payables payment period |  | 30 days |  |
Top of range [member] | Research and development tax incentive program [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Earning income | $ 20,000,000 |  |  |
Patents and intellectual property [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Useful lives of intangible assets | 5 years |  |  |
Software [member] | Bottom of range [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Useful lives of intangible assets | 2.5 years |  |  |
Software [member] | Top of range [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Useful lives of intangible assets | 10 years |  |  |
Licensing agreement for GDC-0084 [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Remaining useful life,licensing agreement | 15 years |  |  |
Plant and equipment [member] | Bottom of range [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Estimated useful life of assets | 2.5 years |  |  |
Plant and equipment [member] | Top of range [member] |  |  |  |
Disclosure of summary of significant accounting policies [line items] |  |  |  |
Estimated useful life of assets | 10 years |  |  |

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