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Debt Instruments (Details) (USD $)
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1 Months Ended | 3 Months Ended | 6 Months Ended | |
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May 31, 2011
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Jul. 31, 2012
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Jul. 31, 2012
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May 13, 2011
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Credit facility
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| Debt Instruments | ||||
| Maximum borrowings available | $ 30,000,000 | |||
| Minimum liquidity requirement | 5,000,000 | |||
| Available borrowing capacity | 29,480,000 | 29,480,000 | ||
| Total debt issuance costs | 1,000,000 | |||
| Term of credit facility agreement | 4 years | |||
| Amount of debt issuance costs that were amortized and included in interest expense | 100,000 | 100,000 | ||
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Letters of credit
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| Debt Instruments | ||||
| Maximum borrowings available | 5,000,000 | |||
| Outstanding amount | 520,000 | 520,000 | ||
| Cash collateral considered to be restricted cash | $ 520,000 | $ 520,000 |
| X | ||||||||||
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- Definition
Represents the minimum amount of liquidity required to be maintained under the credit facility financial covenant. No definition available.
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| X | ||||||||||
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- Definition
Represents the term of the credit facility agreement. No definition available.
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| X | ||||||||||
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- Definition
Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees). No definition available.
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| X | ||||||||||
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- Definition
The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. No definition available.
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| X | ||||||||||
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- Definition
Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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