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Note 2 - Income Tax Expense - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details)
3 Months Ended
Mar. 31, 2020
USD ($)
Unrecognized tax benefits as of December 31, 2019 $ 848,000
Additions for tax positions of current year
Additions for tax positions of prior years (9,000)
Reductions for settlements with taxing authorities (59,000)
Reductions for lapses of the applicable statutes of limitations
Unrecognized tax benefits as of March 31, 2020 $ 780,000