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Deferred Tax Assets and Liabilities - Summary of Deferred Taxes (Details) - GBP (£) £ in Thousands | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Beginning balance | £ (1,719) | £ (424)
Exchange adjustments | (65) | (124)
Credit (charge) to profit and loss | 350 | (138)
Credit to equity | 1,090 | 42
Acquisition | 0 | (1,075)
Ending balance | (344) | (1,719)
Deferred tax charge related to changes in tax rates | 60 | 0
Accelerated capital allowances |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Beginning balance | (76) | (34)
Exchange adjustments | (2) | 0
Credit (charge) to profit and loss | (9) | (42)
Credit to equity | 0 | 0
Acquisition | 0 | 0
Ending balance | (87) | (76)
Tax losses |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Beginning balance | 227 | 312
Exchange adjustments | 0 | 15
Credit (charge) to profit and loss | (165) | (100)
Credit to equity | 0 | 0
Acquisition | 0 | 0
Ending balance | 62 | 227
Share-based compensation |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Beginning balance | 271 | 117
Exchange adjustments | 0 | (1)
Credit (charge) to profit and loss | 309 | 113
Credit to equity | 1,090 | 42
Acquisition | 0 | 0
Ending balance | 1,670 | 271
Intangible assets |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Beginning balance | (2,490) | (1,543)
Exchange adjustments | (61) | (141)
Credit (charge) to profit and loss | 462 | 269
Credit to equity | 0 | 0
Acquisition | 0 | (1,075)
Ending balance | (2,089) | (2,490)
Other temporary differences |  |
Reconciliation of changes in deferred tax liability (asset) [abstract] |  |
Beginning balance | 349 | 724
Exchange adjustments | (2) | 3
Credit (charge) to profit and loss | (247) | (378)
Credit to equity | 0 | 0
Acquisition | 0 | 0
Ending balance | £ 100 | £ 349

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deferred tax expense or income relating to tax rate changes or the imposition of new taxes. [Refer: Deferred tax expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 80 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_80_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deferred tax related to items credited (charged) directly to equity. [Refer: Deferred tax expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from business combinations. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81&doctype=Standard -URIDate 2017-03-09 + Details
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