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Note 5 - Stock-based Compensation (Detail) - Stock-based compensation expense and related income tax benefit (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense, gross	$ 136	$ 14
Income tax benefit at our statutory rate associated with stock-based compensation	(53)	(5)
Stock-based compensation expense, net	$ 83	$ 9

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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