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Debt Instruments (Details) (USD $)
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1 Months Ended | 6 Months Ended | 1 Months Ended | |||
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Jul. 31, 2013
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Jan. 31, 2013
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Jul. 31, 2013
Credit facility
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Jul. 31, 2013
Credit facility
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Jun. 30, 2013
Letters of credit
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Jul. 31, 2013
Letters of credit
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| Debt Instruments | ||||||
| Term of credit facility agreement | 4 years | |||||
| Maximum borrowings available | $ 30,000,000 | $ 30,000,000 | $ 5,000,000 | |||
| Minimum liquidity requirement | 5,000,000 | |||||
| Amount borrowed | 10,000,000 | 3,200,000 | ||||
| Applicable interest rate at the period end (as a percent) | 2.94% | |||||
| Cash collateral considered to be restricted cash | 4,000,000 | |||||
| Cash collateral considered to be restricted cash included in other long-term assets | 3,500,000 | 829,000 | 3,500,000 | |||
| Cash collateral considered to be restricted cash included in prepaid expenses and other current assets | 500,000 | |||||
| Available borrowing capacity | $ 16,000,000 | $ 16,000,000 |
| 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 included in prepaid expenses and other current assets. No definition available.
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| 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
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 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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- Definition
Increase for additional borrowings on the credit facility during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The effective interest rate at the end of the reporting period. 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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| X | ||||||||||
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- Definition
Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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