• Filing Date: 2015-03-10
  • Form Type: 10-K
  • Description: Annual report
v2.4.1.9
Fair Value Measurements - Schedule of Fair Value Information for Financial Assets and Liabilities Carried on Balance Sheet (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Financial Assets:    
ADC Arrangement classified as real estate investment $ 2,888us-gaap_LoansReceivableCommercialRealEstate  
(Level 2) [Member]    
Financial Liabilities:    
Total long-term debt 42,955us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
43,390us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
(Level 2) [Member] | Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt 42,955us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
43,390us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
(Level 3) [Member]    
Financial Assets:    
ADC Arrangement classified as real estate investment 2,835us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
 
Financial Liabilities:    
Total long-term debt 93,367us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
86,630us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
(Level 3) [Member] | Convertible Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt 93,367us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
86,630us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Fair Value, Measurements, Recurring [Member]    
Financial Assets:    
ADC Arrangement classified as real estate investment 2,835us-gaap_LoansReceivableCommercialRealEstate
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Financial Liabilities:    
Total long-term debt 136,322us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
130,020us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value, Measurements, Recurring [Member] | Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt 42,955us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
43,390us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Fair Value, Measurements, Recurring [Member] | Convertible Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt $ 93,367us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
$ 86,630us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember