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Share Based Payments (Details) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested options - beginning of period	431,235
Nonvested options granted	14,000
Nonvested options vested or forfeited	(13,045)
Nonvested options - end of period	432,190
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested options - beginning of period	$ 8.22
Nonvested options granted	10.73	$ 7.67
Nonvested options vested or forfeited	7.87
Nonvested options - end of period	$ 8.32

X

- Definition

Number of nonvested share-based payment award options that vested or were forfeited during the period.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average grant date fair value of nonvested options that were vested or forfeited during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ipar_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

X

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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X

- Definition

Number of non-vested options outstanding.

+ References

No definition available.

+ Details

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Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

No definition available.

+ Details

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X

- References

No definition available.

+ Details

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