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Note 15 - Commitments and Contingencies (Details) - Summary of General Office Facilities and Equipment (USD $)
Dec. 31, 2014
Summary of General Office Facilities and Equipment [Abstract]  
2015 $ 659,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2015 3,951,000us-gaap_PurchaseObligationDueInNextTwelveMonths [1]
2015 4,610,000us-gaap_ContractualObligationDueInNextTwelveMonths
2016 608,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2016 8,051,000us-gaap_PurchaseObligationDueInSecondYear [1]
2016 8,659,000us-gaap_ContractualObligationDueInSecondYear
2017 642,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2017 12,688,000us-gaap_PurchaseObligationDueInThirdYear [1]
2017 13,330,000us-gaap_ContractualObligationDueInThirdYear
2018 642,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2018    [1]
2018 642,000us-gaap_ContractualObligationDueInFourthYear
2019 642,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
2019    [1]
2019 642,000us-gaap_ContractualObligationDueInFifthYear
Thereafter 1,731,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Thereafter    [1]
Thereafter 1,731,000us-gaap_ContractualObligationDueAfterFifthYear
4,924,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue
24,690,000us-gaap_PurchaseObligation [1]
$ 29,614,000us-gaap_ContractualObligation
[1] Rental expense under operating lease agreements was $0.9 million, $0.8 million and $0.9 million for the years ended December 31, 2014, 2013 and 2012, respectively.