Note 2 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	Years Ended December 31,
	2020		2019
Weighted average common shares outstanding–basic		10,256,560		10,373,164
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		-		18,811
Weighted average common shares and common share equivalents outstanding–diluted		10,256,560		10,391,975
Average number of potentially dilutive securities excluded from calculation		717,015		523,485