XML 40 R31.htm IDEA: XBRL DOCUMENT
v3.23.1

CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS - Narrative (Details) - U.S. treasury notes - Fair Value, Inputs, Level 1 | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($) number_security | Mar. 31, 2022 USD ($) number_security
Schedule of Held-to-Maturity Securities [Line Items] |  |
Number of securities in unrealized loss position for more than 12 months | number_security | 0 | 0
Short-term investments, realized gains or losses | $ | $ 0 | $ 0

X
- Definition Debt Securities, Held-To-Maturity, Realized Gain (Loss) + References No definition available. + Details
Name: | idn_DebtSecuritiesHeldToMaturityRealizedGainLoss
Namespace Prefix: | idn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt Securities, Held-To-Maturity, Securities In Unrealized Loss Position, 12 Months Or Longer, Number Of Positions + References No definition available. + Details
Name: | idn_DebtSecuritiesHeldToMaturitySecuritiesInUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix: | idn_
Data Type: | xbrli:integerItemType
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
Name: | us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |