Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

	Three Months Ended March 31,
	2022		2021
Weighted average common shares outstanding–basic		10,617,271		10,329,449
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		225,321		196,377
Weighted average common shares and common share equivalents outstanding–diluted		10,842,592		10,525,826
Average number of potentially dilutive securities excluded from calculation		318,574		347,068