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Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Expense (Benefit), Total	$ 1,101	$ 1,257
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	3,900	4,100
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0		$ 0
Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit), Total	$ 200	$ 400

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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