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COMMITMENTS AND CONTINGENT LIABILITIES (Guarantees) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
TAT Technologies Ltd [Member]
Guarantees:
Bank guarantee to secure liability to Israeli customs	$ 39
TAT Technologies Ltd One [Member]
Guarantees:
Bank guarantee to secure liability to Israeli customs	62
TAT Technologies Ltd Two [Member]
Guarantees:
Bank guarantee to secure liability to Israeli customs	31
Limco Piedmont Inc [Member]
Guarantees:
Bank guarantee to secure liability to lessor	$ 849

X

- Definition

Value of bank guarantee to secure the company's liability to the Israeli customs.

+ References

No definition available.

+ Details

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Namespace Prefix:	tatt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Value of bank guarantee to secure the company's liability to the lessor.

+ References

No definition available.

+ Details

Name:	tatt_BankGuaranteeToSecureLiabilityToLessor
Namespace Prefix:	tatt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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