Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Weighted average common shares outstanding - basic		10,442,916		10,252,490		10,386,183		10,236,672
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		322,020		6,427		259,198		-
Weighted average common shares and common share equivalents outstanding - diluted		10,764,936		10,258,917		10,645,381		10,236,672
Average number of potentially dilutive securities excluded from calculation		274,345		711,499		307,069		719,832