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Private Placement (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	9 Months Ended
	Dec. 31, 2020	Sep. 30, 2021
Subsidiary, Sale of Stock [Line Items]
Exercise price of warrant	$ 11.50	$ 11.50
Private Placement
Subsidiary, Sale of Stock [Line Items]
Number of warrants to purchase shares issued	5,013,333	5,013,333
Price of warrants	$ 1.50	$ 1.50
Proceeds from sale of warrants	$ 7.5	$ 7.5
Number of shares per warrant	1	1
Exercise price of warrant	$ 11.50	$ 11.50

X

- Definition

Price per share or per unit of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	ivan_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

This represents Proceeds from Sale of Units.

+ References

No definition available.

+ Details

Name:	ivan_ProceedsFromSaleOfUnits
Namespace Prefix:	ivan_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: