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Financing Arrangements - Additional Information (Detail) (USD $) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2013 | Jan. 31, 2013
Debt Disclosure [Abstract] |  |
Maximum borrowing amount of revolving loan | $ 4,250,000 |
Interest rate on borrowings under the line of credit | LIBOR plus 2.25% |
Interest rate | 2.25% |
Available funds designated to cover letters of credit issued by Bank in support of project development activities | 1,350,000 |
Maximum amount of standby letters of credits that may be outstanding | 10,000,000 |
Borrowings outstanding under bank financing arrangements | $ 0 | $ 0
Expiration date of financing arrangements | May 31, 2015 |
Ratio of total funded debt to EBITDA | 2 | 2
Fixed charge coverage ratio | 1.25 | 1.25
Ratio of senior funded debt to EBITDA | 1.50 | 1.50

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- Definition Line of credit facility designated to cover letters of credit + References No definition available. + Details
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- Definition The maximum amount of standby letters of credits that may be outstanding. + References No definition available. + Details
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- Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + 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 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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