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Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (USD $) | Total | Redeemable Convertible Preferred Stock Series B [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2013 | $ (22,625,000)us-gaap_StockholdersEquity | $ 707,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | $ 1,825,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 360,665,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (385,115,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balances (in shares) at Dec. 31, 2013 |  | 8,859,978 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 182,535,562 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Net income (loss) | 23,109,000 us-gaap_NetIncomeLoss | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 23,109,000 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Accretion of Series B convertible preferred stock to its redemption value | (1,285,000)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment | 1,285,000 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (1,285,000)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Warrants exercised | 1,595,000 aphb_StockIssuedDuringPeriodValueWarrantsExercised | 0 aphb_StockIssuedDuringPeriodValueWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 28,000 aphb_StockIssuedDuringPeriodValueWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,567,000 aphb_StockIssuedDuringPeriodValueWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 aphb_StockIssuedDuringPeriodValueWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Warrants exercised (in shares) |  | 0 aphb_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 2,734,151 aphb_StockIssuedDuringPeriodSharesWarrantsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Preferred shares converted to common stock | 707,000 aphb_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities1 | (2,000)aphb_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities1 / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 19,000 aphb_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 688,000 aphb_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities1 / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 aphb_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities1 / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Preferred shares converted to common stock (in shares) |  | (188,938)aphb_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities1 / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 1,889,380 aphb_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Stock-based compensation | 775,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 775,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Stock-based compensation - severance | 1,161,000 us-gaap_EmployeeBenefitsAndShareBasedCompensation | 0 us-gaap_EmployeeBenefitsAndShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_EmployeeBenefitsAndShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,161,000 us-gaap_EmployeeBenefitsAndShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_EmployeeBenefitsAndShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Shares released from escrow | 0 aphb_StockIssuedDuringPeriodValueSharesReleasedFromEscrow | 0 aphb_StockIssuedDuringPeriodValueSharesReleasedFromEscrow / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 120,000 aphb_StockIssuedDuringPeriodValueSharesReleasedFromEscrow / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (120,000)aphb_StockIssuedDuringPeriodValueSharesReleasedFromEscrow / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 aphb_StockIssuedDuringPeriodValueSharesReleasedFromEscrow / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Shares released from escrow (in shares) |  | 0 aphb_StockIssuedDuringPeriodSharesSharesReleasedFromEscrow / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 12,000,000 aphb_StockIssuedDuringPeriodSharesSharesReleasedFromEscrow / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Balances at Dec. 31, 2014 | 3,437,000 us-gaap_StockholdersEquity | 1,990,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 1,992,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 363,451,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (362,006,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balances (in shares) at Dec. 31, 2014 |  | 8,671,040 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 199,159,093 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Net income (loss) | (14,493,000)us-gaap_NetIncomeLoss | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (14,493,000)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Accretion of Series B convertible preferred stock to its redemption value | 338,000 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment | 338,000 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 0 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (338,000)us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Net common stock issued in March 2015 financing | 8,266,000 us-gaap_StockIssuedDuringPeriodValueNewIssues | 0 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 787,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 7,479,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Net common stock issued in March 2015 financing (in shares) |  | 0 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 78,787,880 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Stock-based compensation | 52,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 52,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balances at Mar. 31, 2015 | $ (3,076,000)us-gaap_StockholdersEquity | $ 2,328,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | $ 2,779,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 370,644,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (376,499,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Balances (in shares) at Mar. 31, 2015 |  | 8,671,040 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_PreferredStockMember | 277,946,973 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |

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