Line of Credit - Additional Information (Detail)	3 Months Ended
Apr. 30, 2016 USD ($)
Line of Credit Facility [Line Items]
Revolving line of credit	$ 10,000,000
Line of credit, interest rate description	Any borrowings made under this line of credit bear interest at either a fluctuating base rate equal to the highest of (i) the Prime Rate, (ii) 1.50% above the daily one month LIBOR, and (iii) the Federal Funds Rate in effect plus 1.50% or at a fixed rate of LIBOR plus an agreed upon margin of between 0% and 2.25%, based on the Company's funded debt to EBITDA ratio as defined in the agreement.
Borrowings against new line of credit	$ 0
Fixed Charge Coverage Ratio	300.00%
Funded debt to adjusted EBITDA ratio	125.00%
Line of credit expire date	Jan. 31, 2017
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Percentage above rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Percentage above rate	0.00%
London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Percentage above rate	2.25%
Federal Funds Effective Swap Rate [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

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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- 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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