XML 41 R24.htm IDEA: XBRL DOCUMENT v3.22.0.1
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