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Note 8 - Equity Plans (Details) - Stock Based Compensation Expense Recognized on Restricted Stock Units (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact per basic share	$ 0.12	$ 0.15	$ 0.82	$ 1.13
Impact per diluted share	$ 0.12	$ 0.15	$ 0.82	$ 1.13
Restricted Stock Units (RSUs) [Member] \| Expense Before Tax [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share Based Compensation Expense (in Dollars)	$ 238	$ 326	$ 688	$ 878
Restricted Stock Units (RSUs) [Member] \| Expense After Tax [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share Based Compensation Expense (in Dollars)	$ 129	$ 209	$ 422	$ 536
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Impact per basic share	$ 0.01	$ 0.02	$ 0.04	$ 0.05
Impact per diluted share	$ 0.01	$ 0.02	$ 0.04	$ 0.05

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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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details