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Fair Value Measurements - Summary of Changes in Fair Value of Earnout Liabilities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair value at December 31, 2020	$ 2,444,000
Change in fair value	69,950
Fair value at March 31, 2021	$ 2,513,950

X

- Definition

Adjustment to fair value of contingent consideration - earnout.

+ References

No definition available.

+ Details

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Namespace Prefix:	INLX_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Earnout liability.

+ References

No definition available.

+ Details

Name:	INLX_EarnoutLiability
Namespace Prefix:	INLX_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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