Post-effective amendment to a registration statement that is not immediately effective upon filing

Income Taxes (Narrative) (Details)

v2.4.1.9
Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Deferred tax asset $ 0us-gaap_DeferredTaxAssetsNet    
Change in valuation allowance 6,371us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 4,806us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 5,734us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Open tax year 2007    
Federal [Member]      
Income Taxes [Line Items]      
Net operating loss tax carryforwards 50,870us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
   
Net operating loss tax carryforwards, expiration Dec. 31, 2027    
Federal [Member] | Employee Stock Option [Member]      
Income Taxes [Line Items]      
Deferred tax asset 809us-gaap_DeferredTaxAssetsNet
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
   
Federal [Member] | Research and Development [Member]      
Income Taxes [Line Items]      
Net operating loss tax carryforwards 383us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_ResearchMember
   
State [Member]      
Income Taxes [Line Items]      
Net operating loss tax carryforwards 42,569us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
   
Net operating loss tax carryforwards, expiration Dec. 31, 2017    
State [Member] | Employee Stock Option [Member]      
Income Taxes [Line Items]      
Deferred tax asset 501us-gaap_DeferredTaxAssetsNet
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
   
State [Member] | Research and Development [Member]      
Income Taxes [Line Items]      
Net operating loss tax carryforwards $ 189us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_ResearchMember