Stockholders' Equity - Schedule of Estimated Values of Warrants Valuation Assumptions (Details) - Warrant [Member]	12 Months Ended
Dec. 31, 2018
Bridge Noteholders September 21, 2017 [Member]
Risk-free interest rate	1.89%
Weighted average expected term	5 years
Expected volatility	130.80%
Expected dividend yield	0.00%
Placement Agent December 30, 2016 [Member]
Risk-free interest rate	1.93%
Weighted average expected term	5 years
Expected volatility	123.07%
Expected dividend yield	0.00%
Placement Agent November 17, 2017 [Member]
Risk-free interest rate	2.06%
Weighted average expected term	5 years
Expected volatility	129.87%
Expected dividend yield	0.00%
Placement Agent November 30, 2017 [Member]
Risk-free interest rate	2.14%
Weighted average expected term	5 years
Expected volatility	129.34%
Expected dividend yield	0.00%
Placement Agent September 20, 2018 [Member]
Risk-free interest rate	2.96%
Weighted average expected term	5 years
Expected volatility	122.52%
Expected dividend yield	0.00%
Placement Agent September 26, 2018 [Member]
Risk-free interest rate	2.96%
Weighted average expected term	5 years
Expected volatility	122.92%
Expected dividend yield	0.00%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=INLX_BridgeNoteholdersSeptemberTwentyTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=INLX_PlacementAgentDecemberThirtyTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=INLX_PlacementAgentNovemberSeventeenTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=INLX_PlacementAgentNovemberThirtyTwoThousandSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=INLX_PlacementAgentSeptemberTwentyTwoThousandEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=INLX_PlacementAgentSeptemberTwentySixTwoThousandEighteenOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: