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Summary of Significant Accounting Policies - Additional Information (Details) | 3 Months Ended | 0 Months Ended | 3 Months Ended
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Apr. 30, 2015 Source | Apr. 30, 2015 Customer | Jan. 31, 2015 Customer | Apr. 30, 2014 Customer | Apr. 30, 2014
Concentration Risk [Line Items] |  |  |  |  |
Number of revenue sources | 3 box_NumberOfRevenueSources |  |  |  |
Credit Concentration Risk | Accounts Receivable |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of major customer | 1 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember | 1 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember | 0 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |  |
Concentration risk percentage |  | 14.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember |  |
Customer Concentration Risk | Revenue |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of major customer | 0 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 0 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |  | 0 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 0 box_NumberOfMajorCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember
Concentration risk percentage |  |  |  | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
Customer Concentration Risk | Revenue | United States |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage | 80.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_GeographicDistributionAxis = country_US |  |  |  | 80.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_GeographicDistributionAxis = country_US
Geographic Concentration Risk | Property and Equipment | United States |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 98.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NetAssetsGeographicAreaMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_GeographicDistributionAxis = country_US | 98.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NetAssetsGeographicAreaMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember / us-gaap_GeographicDistributionAxis = country_US |  |

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