Note 11 - Stock Benefit Plan (Details) - Stock-based Compensation Expense and Related Tax Effects (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Compensation expense:
Total Compensation Expense	$ 125	$ 117
Tax benefit	4	2
Net income effect	121	115
Employee Stock Option [Member]
Compensation expense:
Total Compensation Expense	115	111
Restricted Stock [Member]
Compensation expense:
Total Compensation Expense	$ 10	$ 6