Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Weighted Average Number of Shares [Table Text Block]

	Years Ended December 31,
	2017		2016
Weighted average common shares outstanding - basic		10,284,572		10,313,747
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		54,741		19,173
Weighted average common shares outstanding - diluted		10,339,313		10,332,920
Average number of potentially dilutive securities excluded from calculation		77,047		18,658