XML 30 R21.htm IDEA: XBRL DOCUMENT v3.22.1
Note 6 - Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2022
Notes Tables  
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Options Outstanding:

             
Range of
Exercise Price		  

Number
Outstanding

  

Wgt. Avg. Contractual
Life Remaining (in

years)

  

Wgt. Avg.
Exercise Price

  

Aggregate
Intrinsic Value

 
$3.50-$3.86   13,000   5.0  $3.75  $346,560 
$7.80     8,000   6.2  $7.80  $117,700 
$19.99     30,000   6.8  $19.99  $222,300 
$39.11     8,000   7.2  $39.11  $-- 
$3.50-$39.11   59,000   6.4  $17.35  $686,560 

Options Exercisable:

             

Range of
Exercise Price

  

Number
Exercisable

  

Wgt. Avg. Contractual
Life Remaining (in
years)

  

Wgt. Avg.
Exercise Price

  

Aggregate
Intrinsic Value

 
$3.50-$3.86   13,000   5.0  $3.75  $346,560 
$7.80     8,000   6.2  $7.80  $117,700 
$19.99     30,000   6.8  $19.99  $222,300 
$39.11     8,000   7.2  $39.11  $-- 
$3.50-$39.11   59,000   6.4  $17.35  $686,560