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Current assets - trade and other receivables - Additional Information (Detail) | 12 Months Ended |  |
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Jun. 30, 2018 AUD ($) | Jun. 30, 2017 AUD ($) | Jun. 30, 2018 EUR (€) | Jun. 30, 2017 EUR (€)
Trade and other receivables [abstract] |  |  |  |
Guarantee included in deposits held | $ 394,073 | $ 371,471 | € 250,000 | € 250,000
Recognised a loss in profit or loss in respect of impairment of receivables (excluding 'deposits held') |  |  |  |

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- Definition The amount of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Trade receivables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ImpairmentLossRecognisedInProfitOrLossTradeReceivables
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | ifrs-full_TradeAndOtherReceivablesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Guarantee deposits assets current. + References No definition available. + Details
Name: | kzia_GuaranteeDepositsAssetsCurrent
Namespace Prefix: | kzia_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant