Note 2 - Summary of Significant Accounting Policies - Weighted Average Common Shares (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Weighted average common shares outstanding - basic (in shares)	10,473,210	10,431,743
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options (in shares)	20,620	34,321
Weighted average common shares outstanding - diluted (in shares)	10,493,830	10,466,064
Average number of potentially dilutive securities excluded from calculation (in shares)		4,753