Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Weighted average common shares outstanding - basic		10,653,268		10,442,916		10,635,270		10,386,183
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		161,531		322,020		193,426		259,198
Weighted average common shares and common share equivalents outstanding - diluted		10,814,799		10,764,936		10,828,696		10,645,381
Average number of potentially dilutive securities excluded from calculation		608,322		274,345		477,448		307,069