Commitments and Contingencies Disclosure [Line Items]

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- Definition

Commitments for contracts related to construction and distribution equipment.

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- Definition

Commitments for contracts related to construction and distribution equipment due In more than one year

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- Definition

Commitments for contracts related to construction and distribution equipment due within one year

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- Definition

Commitments From Vendors For Un Fulfilled Purchase Orders

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- Definition

Deferred Compensation Per One Dollar Contributions Matched Over First Six Percent Contributions

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- Definition

Employee Age Limit To Participate In Benefit Plan

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- Definition

Employee Contribution Percentage Vested At Percentage Of Employers Contribution Per Year

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- Definition

Percentage Of Compensation Deferred By Employee Under Benefit Plan

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Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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- Definition

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

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- Definition

Nominal or face amount on the investment owned.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 20
-Section 10
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6438156&loc=d3e57880-113973

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-URI http://asc.fasb.org/extlink&oid=6431724&loc=d3e32938-113948

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- Definition

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

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Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
	Jan. 31, 2021 USD ($) $ / Employee_Contribution	Jan. 31, 2020 USD ($) $ / Employee_Contribution	Jan. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Commitments for un-fulfilled purchase orders	$ 672,133
Commitments with construction and distribution equipment contractors	291,803
Commitments with construction and distribution equipment contractors due with in one year	120,724
Commitments with construction And distribution equipment contractors due in more than one year	$ 171,079
U.S. based employees age limit to participate in 401(k) Saving Plan	18 years
Employer matching contribution per employee \| $ / Employee_Contribution	0.50	0.25
Percentage of employee contribution for first threshold limit of employer contribution	6.00%	6.00%
Employees contribution percentage vested	100.00%
Percentage of employers contribution per year vested	20.00%
Company's contribution to Savings Plan	$ 6,677,000	$ 7,094,000	$ 3,549,000
Nonqualified Deferred Compensation Plan
Commitments and Contingencies Disclosure [Line Items]
Employees contribution percentage vested	100.00%
Percentage of employers contribution per year vested	100.00%
Company's contribution to Savings Plan	$ 66,000	56,000	$ 46,000
Deferred compensation obligation	10,793,000	8,428,000
Aggregate market value of investments	$ 10,793,000	$ 8,428,000
Minimum
Commitments and Contingencies Disclosure [Line Items]
Percentage of compensation deferred by employees under Saving Plan	1.00%
Maximum
Commitments and Contingencies Disclosure [Line Items]
Percentage of compensation deferred by employees under Saving Plan	25.00%
Omni-Channel Fulfillment Center, Kansas City
Commitments and Contingencies Disclosure [Line Items]
Commitments with construction and distribution equipment contractors	$ 289,131
Trade Letter of credit
Commitments and Contingencies Disclosure [Line Items]
Letter of credit outstanding	$ 52,579