Retirement Benefit Plans (Details) - USD ($)				12 Months Ended
Jan. 01, 2019	Jan. 01, 2018	Jan. 01, 2017	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Postemployment Benefits [Abstract]
Maximum matching contribution percent for 401(k) savings plan	4.00%	4.00%	6.00%
Percent of employee's contribution matched for 401(k) savings plan	100.00%	100.00%	50.00%
Company's matching contributions to the 401(k) savings plan				$ 989,000	$ 904,000	$ 585,000
Additional contributions made on behalf of employees to 401(k) savings plan				0	0	0
Deferred Compensation Plan assets				1,900,000	1,900,000
Deferred Compensation Plan liabilities				1,900,000	1,900,000
Company's matching contributions				$ 0	$ 0	$ 41,000

Defined contribution plan employer discretionary contribution additional amount.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

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

- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ 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 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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- References

No definition available.

+ Details

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