Note 13 - Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Equity Incentive Plan Fair Value Assumptions [Table Text Block]

	2022					​2021
Dividend yield				-	%				-	%
Expected volatility		90.5	–	92.3	%		91.5	–	92.7	%
Risk-free interest rate		1.83	–	2.76	%				0.43	%
Expected lives (years)		5	-	6.25			5	-	6.25

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

				Weighted				Weighted
				Average		Aggregate		Average
				Exercise		Intrinsic		Remaining
	Shares			Price		Value		Contractual Life
Stock options outstanding at December 31, 2020		-		$	-	$	-
Granted		222,700			7.45		3,094
Exercised		-			-	$	-
Forfeited/Expired		-			-		-
Stock options outstanding at December 31, 2021		222,700			7.45	$	3,094		9.7
Granted		226,746			3.18
Exercised		(-	)		-	$	-
Expired		(-	)
Forfeited		(23,800	)		7.45		-
Stock options outstanding at December 31, 2022		425,646		$	5.17	$	-		8.9
Stock options exercisable at December 31, 2022		150,495		$	5.81	$	-		8.9