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Financial Statement Schedules - Schedule II - Valuation and Qualifying Accounts (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Jan. 31, 2014
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Jan. 31, 2013
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Jan. 31, 2012
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| Balance at end of period | $ 20,789 | $ 19,965 | |
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Deferred Tax Assets Valuation Allowance [Member]
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| Balance at beginning of period | 19,965 | 12,254 | 6,985 |
| Additions, Charged to costs and expenses | 824 | 7,711 | 5,269 |
| Additions, Charged to other accounts | |||
| Deductions and write-offs | |||
| Balance at end of period | 20,789 | 19,965 | 12,254 |
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Allowance for Doubtful Accounts [Member]
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| Balance at beginning of period | 946 | 1,127 | 1,141 |
| Additions, Charged to costs and expenses | 286 | 100 | |
| Additions, Charged to other accounts | 31 | 13 | 12 |
| Deductions and write-offs | (936) | (194) | (126) |
| Balance at end of period | $ 327 | $ 946 | $ 1,127 |
| X | ||||||||||
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to accounts other than costs and expenses in a given period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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