Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

	Years Ended December 31,
	2018		2017
Weighted average common shares outstanding–basic		10,347,947		10,284,572
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		34,247		54,741
Weighted average common shares and common share equivalents outstanding–diluted		10,382,194		10,339,313
Average number of potentially dilutive securities excluded from calculation		216,420		77,047