Note 7 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2021			2020
Weighted average risk-free interest rates		1.43	%		0.69	%
Expected dividend yield		0.0	%		0.0	%
Expected life of option (in years)		7.0			7.0
Expected volatility		84.80	%		38.16	%

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

	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (yrs)		Aggregate Intrinsic Value
Outstanding at December 31, 2020		602,000	$	2.79
Granted		360,300		3.82
Exercised		-		-
Forfeited or expired		-		-
Outstanding at December 31, 2021		962,300	$	3.18		9.31	$	499,660
Exercisable at December 31, 2021		200,661	$	2.79		8.93	$	166,549

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Warrant Description	Number of Shares		Exercise Price		Expiration
2020 Warrants		120,000		5.00	Jun 2025
2020 Unit Warrants		2,396,631		5.00	Sep 2025
2020 Representative Warrants		128,000		5.50	Mar 2024
2021 Representative Warrants		72,000		6.875	Aug 2024
2021 Warrants		100,000		13.00	Sep 2026
Total Warrants Outstanding at December 31, 2021		2,816,631
Weighted-Average Exercise Price	$	5.35
Weighted-Average Remaining Life (in years)		3.7