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Note 10 - Share Based Payments (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Black-Scholes-Merton

 
     
     

Volatility

  134

%

Expected life of options (in years)

  5 

Risk-free interest rate

  0.80

%

Dividend yield

  0

%

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

Weighted Average

     
  

Number

  

Weighted

  

Remaining

  

Aggregate

 
  

Of

  

Average

  

Contractual

  

Intrinsic

 
  

Shares

  

Exercise Price

  

Life (years)

  

Value*

 

Shares under option, January 1, 2020

  2,174,000  $0.27   -  $- 

Options granted

  -  $-         

Options exercised

  (24,000

)

 $0.10         

Options cancelled and expired

  (250,000

)

 $(0.10

)

        

Shares under option, December 31, 2020

  1,900,000  $0.21   5.63     

Options granted

  150,000  $0.46         

Options exercised

  (450,000

)

 $0.10         

Options cancelled and expired

  (150,000

)

 $(0.51

)

        

Shares under option, December 31, 2021

  1,450,000  $0.24   5.33  $322 
Schedule of Nonvested Share Activity [Table Text Block]
      

Weighted

 
  

Number of

  

Average

 
  

Shares

  

Fair Value

 

Non-vested stock options at January 1, 2020

  416,667  $0.47 

Options granted

  -  $- 

Vested during period

  (83,833

)

 $(0.47

)

Options cancelled

  (250,000

)

 $(0.80

)

Non-vested shares under option, December 31, 2020

  83,334  $0.47 

Options granted

  150,000  $0.46 

Vested during period

  (83,334

)

 $(0.47

)

Options cancelled

  -  $- 

Non-vested shares under option, December 31, 2021

  150,000  $0.46 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]
      

Weighted Average

  

Weighted

     
      

Remaining

  

Average

  

Aggregate

 
      

Contractual

  

Exercise

  

Intrinsic

 
  

Options

  

Life (years)

  

Price

  

Value

 

Stock options exercisable

  1,300,000   5.63  $0.21  $322 

Stock options expected to vest

  150,000   9.34  $0.46  $- 

Options exercisable and expected to vest

  1,450,000             
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
      

Weighted Average

 
  

Number of

  

Grant Date

 
  

Shares

  

Fair Value

 

Unvested January 1, 2020

  956,000  $0.72 

Granted restricted stock

  1,396,000  $0.88 

Cancelled restricted stock

  (225,000

)

 $(0.81

)

Vested restricted stock

  (407,167

)

 $(0.50

)

Unvested December 31, 2020

  1,720,333  $0.89 

Granted restricted stock

  10,000  $0.85 

Cancelled restricted stock

  (49,000

)

 $(0.68

)

Vested restricted stock

  (781,333

)

 $(0.91

)

Unvested December 31, 2021

  900,000  $0.88