XML 43 R47.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Values on Financial Assets and Liabilities (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents $ 22,781us-gaap_CashAndCashEquivalentsAtCarryingValue $ 29,485us-gaap_CashAndCashEquivalentsAtCarryingValue $ 26,696us-gaap_CashAndCashEquivalentsAtCarryingValue $ 25,497us-gaap_CashAndCashEquivalentsAtCarryingValue
Corporate debt securities        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents $ 1,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CorporateDebtSecuritiesMember