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Debt - Maturities of Outstanding Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]    
2015 $ 3,192us-gaap_LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths  
2016 161us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo  
Total 3,353us-gaap_LongTermDebtAndCapitalLeaseObligations  
Less:    
Current portion (3,192)us-gaap_LongTermDebtCurrent (2,587)us-gaap_LongTermDebtCurrent [1]
Discount on long-term debt (23)us-gaap_DebtInstrumentUnamortizedDiscount  
Noncurrent portion of debt $ 138us-gaap_LongTermDebtNoncurrent $ 621us-gaap_LongTermDebtNoncurrent [1]
[1] Derived from our audited consolidated financial statements as of December 31, 2014.