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Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Expense (Benefit), Total	$ 1,370	$ 1,823	$ 3,781	$ 2,781
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	6,700	5,300	16,500	13,900
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0		0		$ 0
Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit), Total	$ 200	$ 400	$ 500	$ 2,600

X

- Definition

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.

+ References

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-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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