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Note 16 - Fair Value of Financial Instruments (Details Textual) $ in Thousands | Dec. 31, 2016 USD ($)
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Fair Value, Measurements, Recurring [Member] |
Fair Value, Net Asset (Liability) | $ 0

X
- Definition Fair value of asset after deduction of liability. + References No definition available. + Details
Name: | us-gaap_FairValueNetAssetLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |