Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified |
Total
|
Common Stock
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Additional Paid-in Capital
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Accumulated Other Comprehensive Loss
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Accumulated Deficit
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Balances at Jan. 31, 2012 | $ 104,540us-gaap_StockholdersEquity |
$ 16us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
$ 205,955us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
$ (5)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
$ (101,426)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Balances (in shares) at Jan. 31, 2012 |
163,569,361us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Increase (Decrease) in Stockholders' Equity | |||||
Issuance of common stock upon exercise of stock options | 7,306us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
7,305us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock upon exercise of stock options (in shares) |
8,408,842us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Stock-based compensation | 25,500us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
25,500us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Vesting of restricted stock units (in shares) |
400,112us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Share cancellations to satisfy tax withholding on vesting of restricted stock units | (208)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation |
(208)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Share cancellations to satisfy tax withholding on vesting of restricted stock units (in shares) |
(18,340)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock in connection with preferred stock warrant exercise (in shares) |
146,076p_IssuanceOfCommonStockInConnectionWithWarrantExerciseShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Components of comprehensive loss: | |||||
Net loss | (38,148)us-gaap_NetIncomeLoss |
(38,148)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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Other comprehensive loss | (1)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |
(1)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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Balances at Jan. 31, 2013 | 98,989us-gaap_StockholdersEquity |
17us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
238,552us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
(6)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
(139,574)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Balances, shares at Jan. 31, 2013 |
172,506,051us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Increase (Decrease) in Stockholders' Equity | |||||
Issuance of common stock upon exercise of stock options | 18,356us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
18,355us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock upon exercise of stock options (in shares) |
5,659,377us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock in connection with secondary offering, net issuance costs | 378,637p_IssuanceOfCommonStockInConnectionWithSecondaryOfferingValue |
2p_IssuanceOfCommonStockInConnectionWithSecondaryOfferingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
378,635p_IssuanceOfCommonStockInConnectionWithSecondaryOfferingValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock in connection with secondary offering, net issuance costs (in shares) |
15,730,000p_IssuanceOfCommonStockInConnectionWithSecondaryOfferingShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Stock-based compensation | 40,041us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
40,041us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Vesting of restricted stock units (in shares) |
1,520,516us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Share cancellations to satisfy tax withholding on vesting of restricted stock units | (480)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation |
(480)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Share cancellations to satisfy tax withholding on vesting of restricted stock units (in shares) |
(20,004)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Components of comprehensive loss: | |||||
Net loss | (27,017)us-gaap_NetIncomeLoss |
(27,017)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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Other comprehensive loss | (295)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |
(295)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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Balances at Dec. 31, 2013 | 508,231us-gaap_StockholdersEquity |
20us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
675,103us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
(301)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
(166,591)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Balances, shares at Dec. 31, 2013 |
195,395,940us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Increase (Decrease) in Stockholders' Equity | |||||
Issuance of common stock upon exercise of stock options | 17,116us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
17,115us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock upon exercise of stock options (in shares) |
10,437,509us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Stock-based compensation | 87,055us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
87,055us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Vesting of restricted stock units (in shares) |
3,169,456us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Share cancellations to satisfy tax withholding on vesting of restricted stock units | (2,019)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation |
(2,019)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Share cancellations to satisfy tax withholding on vesting of restricted stock units (in shares) |
(73,682)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Stock issued under employee stock purchase plan | 3,407us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan |
3,407us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Stock issued under employee stock purchase plan (in shares) | 142,265us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans |
142,265us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Excess tax benefit from stock-based awards | 348us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation |
348us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Components of comprehensive loss: | |||||
Net loss | (30,406)us-gaap_NetIncomeLoss |
(30,406)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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Other comprehensive loss | (375)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |
(375)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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Balances at Dec. 31, 2014 | $ 583,357us-gaap_StockholdersEquity |
$ 21us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
$ 781,009us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
$ (676)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
$ (196,997)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Balances, shares at Dec. 31, 2014 |
209,071,488us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
X | ||||||||||
- Definition
Issuance of common stock in connection with secondary offering, net issuance costs, shares. No definition available.
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X | ||||||||||
- Definition
Issuance of common stock in connection with secondary offering, net issuance costs. No definition available.
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X | ||||||||||
- Definition
Issuance of common stock in connection with warrant exercise, shares. No definition available.
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X | ||||||||||
- Definition
The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. No definition available.
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X | ||||||||||
- Definition
This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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X | ||||||||||
- Details
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X | ||||||||||
- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. No definition available.
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X | ||||||||||
- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Number of shares issued during the period as a result of an employee stock purchase plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Aggregate change in value for stock issued during the period as a result of employee stock purchase plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Value of stock issued as a result of the exercise of stock options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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