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v2.4.1.9

Property, Plant and Equipment - Additional Information (Detail) (USD $) | 3 Months Ended
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Apr. 30, 2015 | Apr. 30, 2014
Property, Plant and Equipment [Line Items] |  |
Depreciation expense | $ 119,000 us-gaap_Depreciation | $ 142,000 us-gaap_Depreciation
Costs of maintenance and repairs | 102,000 us-gaap_CostOfPropertyRepairsAndMaintenance | 48,000 us-gaap_CostOfPropertyRepairsAndMaintenance
Selling, General and Administrative Expenses [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Rent expense | 49,000 us-gaap_LeaseAndRentalExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember | 48,000 us-gaap_LeaseAndRentalExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember
Costs of Revenues [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Rent expense | $ 4,612,000 us-gaap_LeaseAndRentalExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember | $ 1,596,000 us-gaap_LeaseAndRentalExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember

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- Definition The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_CostOfPropertyRepairsAndMaintenance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |