Note 12 - Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 12 - Employee Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	3.00%
Defined Contribution Plan, Safe Harbor Contribution	5.00%
Defined Contribution Plan, Employer Matching Contribution, Amount	$ 224,000	$ 203,000
Defined Contribution Plan, Employer Safe Harbor Contribution, Amount	$ 421,000	$ 388,000
2011 Employee Stock Purchase Plan [Member]
Note 12 - Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	30,000
Employee Stock Purchase Plan, Shares Issued Since Inception of Plan (in Shares)	12,790