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Note 8 - Equity Plans (Details) - Stock Based Compensation Expense Recognized on Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Impact per basic share	$ (1.99)	$ 0.32	$ (1.89)	$ 0.57
Impact per diluted share	$ (1.99)	$ 0.32	$ (1.89)	$ 0.57
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
RSU expense before taxes	$ 311	$ 268	$ 542	$ 521
RSU expense after taxes	$ 191	$ 176	$ 317	$ 333
Impact per basic share	$ 0.02	$ 0.02	$ 0.03	$ 0.03
Impact per diluted share	$ 0.02	$ 0.02	$ 0.03	$ 0.03

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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