Line of Credit - Additional Information (Detail) - USD ($)	12 Months Ended
Jan. 31, 2017	Feb. 28, 2017
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity	$ 10,000,000
Line of credit, interest rate description	Any borrowings made under the line of credit would bear interest at a fluctuating variable rate of either (i) the Prime Rate plus an agreed upon margin of between 0% and 0.50%, based upon the consolidated leverage ratio (funded debt EBITDA, as defined); or (ii) the Eurocurrency Rate (LIBOR) plus an agreed-upon margin of between 1.00% and 1.50%, based upon the consolidated leverage ratio.
Borrowings against new line of credit	$ 0
Fixed Charge Coverage Ratio	3.00%
Funded debt to adjusted EBITDA ratio	1.25%
Prime Rate [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Percentage above rate	0.00%
Prime Rate [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Percentage above rate	0.50%
London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Percentage above rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Percentage above rate	1.50%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit expire date	Aug. 30, 2017
Subsequent Event [Member] \| Revolving Credit Facility [Member] \| Bank of America, N.A. [Member]
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity		$ 10,000,000

Fixed Charge Coverage Ratio

No definition available.

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- Definition

Funded Debt to Adjusted EBITDA Ratio

+ References

No definition available.

+ Details

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- 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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- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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- 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

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- 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

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- Details

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- Details

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