Note 11 - Stock-Based Compensation (Details) - Non-Full Value Awards, all of Which Have Been Granted as Stock Options $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Non-Full Value Awards, all of Which Have Been Granted as Stock Options [Abstract]
Shares | shares	154,915
Weighted-Average Exercise Price | $ / shares	$ 15.19
Weighted-Average Remaining Contractual Term	2 years 109 days
Aggregate Intrinsic Value $(000) | $	$ 600
Exercisable shares at December 31, 2015 | shares	109,130
Exercisable shares at December 31, 2015 | $ / shares	$ 16.14
Exercisable shares at December 31, 2015	2 years 109 days
Exercisable shares at December 31, 2015 | $	$ 600	[1]
Exercised | shares	(45,785)
Exercised | $ / shares	$ 12.92
Shares | shares	109,130
Weighted-Average Exercise Price | $ / shares	$ 16.14

[1] * The intrinsic value of a stock option is the difference between the market value of the underlying stock and the exercise price of the option.