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Note 15 - Commitments and Contingencies (Details) - Summary of General Office Facilities and Equipment (USD $) | Dec. 31, 2014
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Summary of General Office Facilities and Equipment [Abstract] |  |
2015 | $ 659,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent |
2015 | 3,951,000 us-gaap_PurchaseObligationDueInNextTwelveMonths | [1]
2015 | 4,610,000 us-gaap_ContractualObligationDueInNextTwelveMonths |
2016 | 608,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears |
2016 | 8,051,000 us-gaap_PurchaseObligationDueInSecondYear | [1]
2016 | 8,659,000 us-gaap_ContractualObligationDueInSecondYear |
2017 | 642,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears |
2017 | 12,688,000 us-gaap_PurchaseObligationDueInThirdYear | [1]
2017 | 13,330,000 us-gaap_ContractualObligationDueInThirdYear |
2018 | 642,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears |
2018 |  | [1]
2018 | 642,000 us-gaap_ContractualObligationDueInFourthYear |
2019 | 642,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears |
2019 |  | [1]
2019 | 642,000 us-gaap_ContractualObligationDueInFifthYear |
Thereafter | 1,731,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter |
Thereafter |  | [1]
Thereafter | 1,731,000 us-gaap_ContractualObligationDueAfterFifthYear |
| 4,924,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |
| 24,690,000 us-gaap_PurchaseObligation | [1]
| $ 29,614,000 us-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.

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