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Note B - Summary of Significant Accounting Policies (Details) - Other Comprehensive Income Activity (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Other Comprehensive Income Activity [Abstract]      
Foreign currency translation adjustments $ (2,017)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax $ 251us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax $ (436)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Realized losses reclassified into earnings(1) 526us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax [1]    [1]    [1]
Other comprehensive (loss) income, net of tax $ (1,491)us-gaap_OtherComprehensiveIncomeLossNetOfTax $ 251us-gaap_OtherComprehensiveIncomeLossNetOfTax $ (436)us-gaap_OtherComprehensiveIncomeLossNetOfTax
[1] For the year ended December 31, 2014, amount represents the reclassification of foreign currency translation adjustments from accumulated othercomprehensive loss into earnings as a result of closing one of our international offices. Amount is included in the other (expense) income line item in thestatements of comprehensive income.