Note 12 - Stock-Based Compensation (Details) - Stock Option Activity by Exercise Price (USD $)	12 Months Ended
	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares Under Outstanding Options	86,348
Weighted-Average Remaining Contractual Term	5 years 109 days
Shares Under Exercisable Options	38,239
Exercise Price 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	10.44
Shares Under Outstanding Options	15,000
Weighted-Average Remaining Contractual Term	3 years 73 days
Shares Under Exercisable Options	15,000
Exercise Price 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	10.90
Shares Under Outstanding Options	6,000
Weighted-Average Remaining Contractual Term	2 years 146 days
Shares Under Exercisable Options	6,000
Exercise Price 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	10.90
Shares Under Outstanding Options	41,400
Weighted-Average Remaining Contractual Term	7 years 146 days
Exercise Price 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	11.22
Shares Under Outstanding Options	11,948
Weighted-Average Remaining Contractual Term	5 years 328 days
Shares Under Exercisable Options	5,239
Exercise Price 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	11.54
Shares Under Outstanding Options	4,000
Weighted-Average Remaining Contractual Term	2 years 73 days
Shares Under Exercisable Options	4,000
Exercise Price 6 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	11.75
Shares Under Outstanding Options	4,000
Weighted-Average Remaining Contractual Term	1 year 73 days
Shares Under Exercisable Options	4,000
Exercise Price 7 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price (in Dollars per share)	14.32
Shares Under Outstanding Options	4,000
Weighted-Average Remaining Contractual Term	73 days
Shares Under Exercisable Options	4,000