Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Cash, Cash Equivalents and Restricted Cash [Table Text Block]

	September 30, 2023		December 31, 2022
Cash and cash equivalents	$	41,685	$	13,434
Restricted cash		-		1,142
Total cash, cash equivalents and restricted cash	$	41,685	$	14,576

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Weighted average common shares outstanding - basic		11,886,005		10,695,867		11,294,306		10,655,469
Potentially dilutive securities:
Unvested shares of restricted stock and employee stock options		326,312		168,673		371,544		185,175
Weighted average common shares and common share equivalents outstanding - diluted		12,212,317		10,864,540		11,665,850		10,840,644
Average number of potentially dilutive securities excluded from calculation because their effect was anti-dilutive during the period		107,666		518,145		119,585		491,014