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CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Current assets: |  |
Cash and cash equivalents | $ 154,126 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 338,696 us-gaap_CashAndCashEquivalentsAtCarryingValue
Marketable securities | 145,983 us-gaap_AvailableForSaleSecuritiesCurrent | 48,966 us-gaap_AvailableForSaleSecuritiesCurrent
Accounts receivable | 6,001 us-gaap_AccountsReceivableNetCurrent | 2,251 us-gaap_AccountsReceivableNetCurrent
Prepaids and other current assets | 8,541 us-gaap_PrepaidExpenseAndOtherAssetsCurrent | 8,253 us-gaap_PrepaidExpenseAndOtherAssetsCurrent
Deferred taxes | 187 us-gaap_DeferredTaxAssetsNetCurrent | 205 us-gaap_DeferredTaxAssetsNetCurrent
Total current assets | 314,838 us-gaap_AssetsCurrent | 398,371 us-gaap_AssetsCurrent
Intangible assets, net | 89,371 us-gaap_FiniteLivedIntangibleAssetsNet | 117,172 us-gaap_FiniteLivedIntangibleAssetsNet
Goodwill | 116,899 us-gaap_Goodwill | 116,899 us-gaap_Goodwill
Property, plant and equipment, net | 64,023 us-gaap_PropertyPlantAndEquipmentNet | 72,642 us-gaap_PropertyPlantAndEquipmentNet
Deferred taxes, long term | 536 us-gaap_DeferredTaxAssetsNetNoncurrent | 4,797 us-gaap_DeferredTaxAssetsNetNoncurrent
Other assets | 2,612 us-gaap_OtherAssetsNoncurrent | 3,498 us-gaap_OtherAssetsNoncurrent
Total assets | 588,279 us-gaap_Assets | 713,379 us-gaap_Assets
Current liabilities: |  |
Accounts payable | 6,962 us-gaap_AccountsPayableCurrent | 7,001 us-gaap_AccountsPayableCurrent
Accrued salaries and benefits | 14,840 us-gaap_EmployeeRelatedLiabilitiesCurrent | 33,448 us-gaap_EmployeeRelatedLiabilitiesCurrent
Convertible notes, short-term | 0 us-gaap_ConvertibleNotesPayableCurrent | 164,047 us-gaap_ConvertibleNotesPayableCurrent
Deferred Revenue, Current | 4,133 us-gaap_DeferredRevenueCurrent | 466 us-gaap_DeferredRevenueCurrent
Other current liabilities | 8,723 us-gaap_OtherAccruedLiabilitiesCurrent | 7,880 us-gaap_OtherAccruedLiabilitiesCurrent
Total current liabilities | 34,658 us-gaap_LiabilitiesCurrent | 212,842 us-gaap_LiabilitiesCurrent
Convertible notes, long-term | 115,089 us-gaap_ConvertibleLongTermNotesPayable | 109,629 us-gaap_ConvertibleLongTermNotesPayable
Long-term imputed financing obligation | 39,063 rmbs_LongTermImputedFinancingObligation | 39,349 rmbs_LongTermImputedFinancingObligation
Long-term income taxes payable | 2,769 us-gaap_AccruedIncomeTaxesNoncurrent | 6,561 us-gaap_AccruedIncomeTaxesNoncurrent
Other long-term liabilities | 5,078 us-gaap_OtherLiabilitiesNoncurrent | 4,769 us-gaap_OtherLiabilitiesNoncurrent
Total liabilities | 196,657 us-gaap_Liabilities | 373,150 us-gaap_Liabilities
Commitments and contingencies (Notes 12 and 18) |  |
Stockholders’ equity: |  |
Convertible preferred stock, $.001 par value: Authorized: 5,000,000 shares; Issued and outstanding: no shares at December 31, 2014 and December 31, 2013 | 0 us-gaap_PreferredStockValue | 0 us-gaap_PreferredStockValue
Common Stock, $.001 par value: Authorized: 500,000,000 shares; Issued and outstanding: 115,161,675 shares at December 31, 2014 and 113,459,390 shares at December 31, 2013 | 115 us-gaap_CommonStockValue | 113 us-gaap_CommonStockValue
Additional paid in capital | 1,153,435 us-gaap_AdditionalPaidInCapitalCommonStock | 1,128,148 us-gaap_AdditionalPaidInCapitalCommonStock
Accumulated deficit | (761,526)us-gaap_RetainedEarningsAccumulatedDeficit | (787,727)us-gaap_RetainedEarningsAccumulatedDeficit
Accumulated other comprehensive loss | (402)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | (305)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Total stockholders’ equity | 391,622 us-gaap_StockholdersEquity | 340,229 us-gaap_StockholdersEquity
Total liabilities and stockholders’ equity | $ 588,279 us-gaap_LiabilitiesAndStockholdersEquity | $ 713,379 us-gaap_LiabilitiesAndStockholdersEquity

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