Pledge of capital stock to direct foreign subsidiaries.

No definition available.

Name:	hckt_PledgeOfCapitalStockToDirectForeignSubsidiaries
Namespace Prefix:	hckt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Pledge of capital stock to U.S. subsidiaries.

+ References

No definition available.

+ Details

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Namespace Prefix:	hckt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Fair value of the amount outstanding under the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

+ Details

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

- 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_LineOfCreditFacilityLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Period Type:

- Details

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Credit Facility (Narrative) (Details) - Revolving line of credit facility [Member] - USD ($)		3 Months Ended
	Mar. 28, 2020	Mar. 27, 2020	Dec. 27, 2019
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility		$ 45,000,000
Maturity date		May 09, 2021
Pledge of capital stock to U.S. subsidiaries		100.00%
Pledge of capital stock to direct foreign subsidiaries		66.00%
Outstanding balance		$ 0	$ 0
Commitment fees percentage		0.125%
Subsequent Event [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility	$ 45,000,000
Maturity date	Nov. 30, 2022
Increase in interest payable	0.50%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate		1.50%
Base Rate [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate		0.75%
LIBOR Floor Rate [Member] \| Subsequent Event [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate	0.75%