Financial instruments, Liquidity Risk (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Contractual cash flows [abstract]
Total current and non-current payables	$ 8,552	$ 9,049	$ 5,216
Liquidity Risk [Member]
Contractual cash flows [abstract]
Payables	8,340	8,795
Lease liabilities	219	255
Total current and non-current payables	8,559	9,050
Liquidity Risk [Member] \| Less than 1 Year [Member]
Contractual cash flows [abstract]
Payables	8,340	8,794
Lease liabilities	138	168
Total current and non-current payables	8,478	8,962
Liquidity Risk [Member] \| 1-2 Years [Member]
Contractual cash flows [abstract]
Payables	0	0
Lease liabilities	38	87
Total current and non-current payables	38	87
Liquidity Risk [Member] \| 2-5 Years [Member]
Contractual cash flows [abstract]
Payables	0	0
Lease liabilities	43	0
Total current and non-current payables	43	0
Liquidity Risk [Member] \| More than 5 Years [Member]
Contractual cash flows [abstract]
Payables	0	0
Lease liabilities	0	0
Total current and non-current payables	$ 0	$ 0

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_LeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of trade payables and other payables. [Refer: Trade payables; Other payables]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 54
-Subparagraph k
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_k&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_TradeAndOtherPayables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	ionr_ContractualCashFlowsAbstract
Namespace Prefix:	ionr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of trade payables and other payables current and noncurrent. [Refer: Trade payables; Other payables]

+ References

No definition available.

+ Details

Name:	ionr_TradeAndOtherPayablesCurrentAndNoncurrent
Namespace Prefix:	ionr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_LiquidityRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: