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Statements of Stockholders' Equity (Unaudited) (Parenthetical)	3 Months Ended
	Mar. 31, 2022 shares
Statement of Stockholders' Equity [Abstract]
[custom:ExerciseOfStockOptionsNetOfCashlessExerciseShares]	58,122
[custom:ExerciseOfStockOptionsNetOfSharesWithheld]	92,634

X

- Definition

Exercise of stock options, net of cashless exercise of shares.

+ References

No definition available.

+ Details

Name:	IDN_ExerciseOfStockOptionsNetOfCashlessExerciseShares
Namespace Prefix:	IDN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	IDN_ExerciseOfStockOptionsNetOfSharesWithheld
Namespace Prefix:	IDN_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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