Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Weighted average common shares outstanding - basic		10,496,188		10,269,995		10,422,851		10,247,779
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		296,102		17,567		271,500		-
Weighted average common shares and common share equivalents outstanding - diluted		10,792,290		10,287,562		10,694,351		10,247,779
Average number of potentially dilutive securities excluded from calculation		237,545		631,392		283,894		722,538