Represent the amount of investment repurchase.

No definition available.

Name:	ictsf_AmountOfInvestmentRepurchase
Namespace Prefix:	ictsf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Commitments And Contingencies [Line Items].

+ References

No definition available.

+ Details

Name:	ictsf_CommitmentsAndContingenciesLineItems
Namespace Prefix:	ictsf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Commision expected to be received by third party.

+ References

No definition available.

+ Details

Name:	ictsf_ExpectedCommission
Namespace Prefix:	ictsf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represent the minimum guaranteed amount of investment repurchase..

+ References

No definition available.

+ Details

Name:	ictsf_GuaranteedAmountOfInvestmentRepurchase
Namespace Prefix:	ictsf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represent the total investment amount.Represents the amount of Represent the total investment amount investment.

+ References

No definition available.

+ Details

Name:	ictsf_InvestmentAmount
Namespace Prefix:	ictsf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of agency fee payable with capital.

+ References

No definition available.

+ Details

Name:	ictsf_MaximumAgencyFeePayable
Namespace Prefix:	ictsf_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The agency fee payable as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	ictsf_MinimumAgencyFeePayable
Namespace Prefix:	ictsf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of issued and outstanding share acquired.

+ References

No definition available.

+ Details

Name:	ictsf_PercentageOfIssuedAndOutstandingShareAcquired
Namespace Prefix:	ictsf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale consideration, fee.

+ References

No definition available.

+ Details

Name:	ictsf_SaleConsiderationFee
Namespace Prefix:	ictsf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents threshold percentage of shares of the subsidiary will be sold.

+ References

No definition available.

+ Details

Name:	ictsf_ThresholdPercentageOfSharesOfSubsidiaryWillBeSold
Namespace Prefix:	ictsf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ictsf_WhiteLineBVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES (Narrative) (Details) € in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Feb. 28, 2019 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 USD ($)	Jan. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2018 USD ($)	Aug. 31, 2017	Mar. 31, 2016 USD ($)
Commitments And Contingencies [Line Items]
Outstanding letters of credit						$ 3,250
Guarantees as security			€ 1,022			1,161
Minimum agency fee payable	$ 3,000		€ 3,000			$ 3,409
Expected Commission	5.00%		5.00%			5.00%
Sale consideration, fee			€ 2,000	$ 2,273
Percentage of issued and outstanding share acquired		10.00%
Guaranteed amount for investment repurchase		$ 3,500
Amount of investment repurchase							$ 3,500
Percentage of shares of the subsidiary will be sold	50.00%		50.00%	50.00%
Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Minimum agency fee payable					$ 4,000
Maximum agency fee payable					$ 20,000
White Line B V [Member]
Commitments And Contingencies [Line Items]
Investment amount		$ 3,500
Minimum [Member]
Commitments And Contingencies [Line Items]
Minimum agency fee payable						$ 4,000			$ 4,000
Expected Commission								2.00%	2.00%
Minimum [Member] \| Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Expected Commission					2.00%
Maximum [Member]
Commitments And Contingencies [Line Items]
Expected Commission								10.00%	5.00%
Maximum [Member] \| Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Expected Commission					3.00%