Note 2 - Summary of Significant Accounting Policies - Weighted Average Common Shares (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Weighted average common shares outstanding - basic (in shares)	10,390,002	10,465,414
Potentially dilutive securities:
Unvested shares of restricted stock and stock options (in shares)	14,242	18,113
Weighted average common shares and common share equivalents outstanding - diluted (in shares)	10,404,244	10,483,527
Average number of potentially dilutive securities excluded from calculation (in shares)	15,231