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Note 17 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 21.00% | 21.00% | 35.00%
Tax Cuts and Jobs Act, Income Tax Expense (Benefit), Total | $ 900 |  |  |
Tax Cuts and Jobs Act, Change in Tax Rate, Income Tax Expense (Benefit), Total | 600 |  |  |
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense | $ 200 |  |  |
Open Tax Year |  | 2015 2016 2017 2018 2019 |  |
Unrecognized Tax Benefits, Income Tax Penalties Accrued |  | $ 0 | $ 0 |
Domestic Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total |  | 13,200 |  |
Operating Loss Carryforwards, Expired Between 2035 and 2036 |  | 6,700 |  |
Operating Loss Carryforwards, Indefinite lived |  | 6,500 |  |
Tax Credit Carryforward, Amount |  | 2,900 |  |
Domestic Tax Authority [Member] | Capital Loss Carryforward [Member] |  |  |  |
Tax Credit Carryforward, Amount |  | 900 |  |
State and Local Jurisdiction [Member] |  |  |  |
Operating Loss Carryforwards, Total |  | 32,100 |  |
Tax Credit Carryforward, Amount |  | 4,200 |  |
Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total |  | $ 3,000 |  |

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