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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Apr. 30, 2015 | Apr. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net loss | $ (47,283)us-gaap_NetIncomeLoss | $ (38,511)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 9,166 us-gaap_DepreciationAndAmortization | 5,896 us-gaap_DepreciationAndAmortization
Stock-based compensation expense | 12,715 us-gaap_ShareBasedCompensation | 5,752 us-gaap_ShareBasedCompensation
Amortization of deferred commissions | 3,606 us-gaap_AmortizationOfDeferredSalesCommissions | 2,858 us-gaap_AmortizationOfDeferredSalesCommissions
Remeasurement of redeemable convertible preferred stock warrant liability |  | 267 us-gaap_FairValueAdjustmentOfWarrants
Other | (2)us-gaap_OtherNoncashIncomeExpense | 157 us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities, net of effects of acquisitions: |  |
Accounts receivable | 15,623 us-gaap_IncreaseDecreaseInAccountsReceivable | 10,586 us-gaap_IncreaseDecreaseInAccountsReceivable
Deferred commissions | (2,813)box_IncreaseDecreaseInDeferredCommissions | (2,789)box_IncreaseDecreaseInDeferredCommissions
Prepaid expenses, restricted cash and other assets | (28,455)box_IncreaseDecreaseInPrepaidExpensesAndRestrictedCashAndOtherAssets | (2,283)box_IncreaseDecreaseInPrepaidExpensesAndRestrictedCashAndOtherAssets
Accounts payable | 266 us-gaap_IncreaseDecreaseInAccountsPayable | 1,314 us-gaap_IncreaseDecreaseInAccountsPayable
Accrued expenses and other liabilities | (997)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities | (6,288)us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Deferred rent | 1,848 box_IncreaseDecreaseInDeferredRent | 695 box_IncreaseDecreaseInDeferredRent
Deferred revenue | 4,144 us-gaap_IncreaseDecreaseInDeferredRevenue | (1,122)us-gaap_IncreaseDecreaseInDeferredRevenue
Net cash used in operating activities | (32,182)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | (23,468)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchases of marketable securities | (106,319)us-gaap_PaymentsToAcquireAvailableForSaleSecurities |
Sales of marketable securities | 3,140 us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities |
Purchases of property and equipment | (9,901)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (5,961)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Acquisitions and purchases of intangible assets, net of cash acquired | (200)box_PaymentsToAcquireBusinessesAndPurchasesOfIntangibleAssetsNetOfCashAcquired |
Net cash used in investing activities | (113,280)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (5,961)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Payment of initial public offering costs | (1,333)box_PaymentOfInitialPublicOfferingIssuanceCosts | (1,735)box_PaymentOfInitialPublicOfferingIssuanceCosts
Proceeds from exercise of stock options, net of repurchases of early exercised stock options | 796 us-gaap_ProceedsFromStockOptionsExercised | 1,577 us-gaap_ProceedsFromStockOptionsExercised
Employee payroll taxes paid related to net share settlement of restricted stock units | (4,215)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation |
Payments of capital lease obligations | (228)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations |
Net cash used in financing activities | (4,980)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (158)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate changes on cash and cash equivalents | (7)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations | 2 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations
Net decrease in cash and cash equivalents | (150,449)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (29,585)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period | 330,436 us-gaap_CashAndCashEquivalentsAtCarryingValue | 108,851 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period | 179,987 us-gaap_CashAndCashEquivalentsAtCarryingValue | 79,266 us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION: |  |
Cash paid for interest | 359 us-gaap_InterestPaid | 206 us-gaap_InterestPaid
Cash paid for income taxes | 458 us-gaap_IncomeTaxesPaid | 124 us-gaap_IncomeTaxesPaid
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES: |  |
Change in accrued equipment purchases | (2,798)box_ChangeInAccruedEquipmentPurchases | 9,533 box_ChangeInAccruedEquipmentPurchases
Purchases of property and equipment under capital lease | 1,730 us-gaap_CapitalLeaseObligationsIncurred |
Issuance of common stock in connection with acquisitions and purchases of intangible assets | 664 box_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsiderationSharesIssuedValue |
Vesting of early exercised stock options and restricted stock | 40 box_EarlyVestingOfExercisedStockOptionsAndRestrictedStock | 240 box_EarlyVestingOfExercisedStockOptionsAndRestrictedStock
Change in unpaid deferred offering costs | $ (1,333)box_ChangeInUnpaidDeferredOfferingCosts | $ (411)box_ChangeInUnpaidDeferredOfferingCosts

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- Definition Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + 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 (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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