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Note 15 - Excess Tax Benefit Reclassification (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Cash Provided by (Used in) Operating Activities, Total	$ 150,623,000	$ 121,879,000	$ 133,801,000
Net Cash Provided by (Used in) Financing Activities, Total	$ (8,381,000)	$ (11,258,000)	(36,457,000)
Accounting Standards Update 2016-09 [Member]
Net Cash Provided by (Used in) Operating Activities, Total			235,000
Net Cash Provided by (Used in) Financing Activities, Total			$ 235,000

X

- Definition

Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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-SubTopic 10
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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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