Consolidated Statements of Stockholders' Equity (Deficit) (USD $) In Thousands, except Share data
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Total
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Common Stock
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Additional Paid-in Capital
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Accumulated Other Comprehensive Income (Loss)
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Accumulated Deficit
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Stockholders' Equity (Deficit), Total at Dec. 31, 2011 |
$ 10,901us-gaap_StockholdersEquity |
$ 104us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
$ 255,818us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
$ 0us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
$ (245,021)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Shares at Dec. 31, 2011 |
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103,989,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Share-based compensation expense |
8,349us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
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8,349us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock for cash, net, shares |
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7,820,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock for cash, net |
81,477us-gaap_StockIssuedDuringPeriodValueNewIssues |
8us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
81,469us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units, shares |
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526,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units, net |
1,680us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
1,679us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of restricted stock awards, shares |
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374,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of restricted stock awards |
0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures |
0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Net loss |
(53,552)us-gaap_NetIncomeLoss |
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Stockholders' Equity (Deficit), Total at Dec. 31, 2012 |
48,855us-gaap_StockholdersEquity |
113us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
347,315us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
0us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
(298,573)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Shares at Dec. 31, 2012 |
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112,709,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Share-based compensation expense |
9,538us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
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9,538us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units, shares |
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1,363,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units, net |
5,079us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
5,078us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of restricted stock awards, shares |
461,729us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures |
462,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of restricted stock awards |
0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures |
1us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
(1)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Other comprehensive income (loss) |
17us-gaap_OtherComprehensiveIncomeLossBeforeTax |
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17us-gaap_OtherComprehensiveIncomeLossBeforeTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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Net loss |
(83,479)us-gaap_NetIncomeLoss |
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Stockholders' Equity (Deficit), Total at Dec. 31, 2013 |
(19,990)us-gaap_StockholdersEquity |
115us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
361,930us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
17us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
(382,052)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Shares at Dec. 31, 2013 |
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114,534,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Share-based compensation expense |
15,274us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
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15,274us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock for cash, net, shares |
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8,846,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock for cash, net |
107,713us-gaap_StockIssuedDuringPeriodValueNewIssues |
9us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
107,704us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units, shares |
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1,552,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock units, net |
6,788us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |
1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
6,787us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Issuance of restricted stock awards, shares |
789,345us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures |
789,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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Issuance of restricted stock awards |
0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures |
1us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
(1)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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Other comprehensive income (loss) |
(58)us-gaap_OtherComprehensiveIncomeLossBeforeTax |
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(58)us-gaap_OtherComprehensiveIncomeLossBeforeTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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Net loss |
(68,375)us-gaap_NetIncomeLoss |
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Stockholders' Equity (Deficit), Total at Dec. 31, 2014 |
$ 41,352us-gaap_StockholdersEquity |
$ 126us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
$ 491,694us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
$ (41)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
$ (450,427)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Shares at Dec. 31, 2014 |
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125,721,000us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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