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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
The following table presents the weighted-average assumptions used for options granted under the 2021 Plan:

The following table presents the weighted-average assumptions used for options granted under the 2021 Plan:

 

   2021 
Option term (years)   4.04 
Volatility   108.33%
Unvested forfeiture rate   0.18%
Risk-free interest rate   0.84%
Dividend yield   0.00%
Weighted-average fair value per option granted  $5.04 

 

The following table presents the weighted-average assumptions used for options granted under the 2014 Plan:

 

   2020 
Option term (years)   6.25 
Volatility   106.22%
Unvested forfeiture rate   0.20%
Risk-free interest rate   0.31%
Dividend yield   0.00%
Weighted-average fair value per option granted  $0.57 

 

No options were granted under the 2014 Plan for the year ended December 31, 2021.

 

The following table presents the weighted-average assumptions used for options granted under the 2012 Plan:

 

   2020 
Option term (years)   6.25 
Volatility   106.46%
Unvested forfeiture rate   0.20%
Risk-free interest rate   0.28%
Dividend yield   0.00%
Weighted-average fair value per option granted  $0.61 
Total share-based compensation expense, related to the Company’s share-based awards, recognized for the years ended December 31, was comprised as follows:

Total share-based compensation expense, related to the Company’s share-based awards, recognized for the years ended December 31, was comprised as follows:

 

   2021   2020 
(Dollars in thousands)          
Cost of cryptocurrency revenue  $3   $ 
Selling, general and administrative   1,938    40 
Share-based compensation expense  $1,941   $40 
Presented below is a summary of the Company’s stock option activity for the Plans for the years ended December 31:

Presented below is a summary of the Company’s stock option activity for the Plans for the years ended December 31:

 

   2021   2020 
Shares under option, beginning   398,750    527,875 
Granted   716,200    50,000 
Exercised   (123,400)   (83,000)
Forfeited       (27,750 
Expired/canceled       (68,375)
Shares under option, ending   991,550    398,750 
Options exercisable   385,800    276,000 
Remaining shares available for granting of options   392,717    11,125 

 

The weighted average exercise price for the Company’s stock option activity for the Plans is as follows for each of the years ended December 31:

 

   2021   2020 
Shares under option, beginning  $0.87   $0.89 
Granted  $7.20   $0.73 
Exercised  $0.83   $1.00 
Forfeited  $   $0.90 
Expired/canceled  $   $0.73 
Shares under option, ending  $5.44   $0.87 
Options exercisable, ending  $4.10   $0.89 
The following table summarizes information for options outstanding and exercisable for the Plans as of December 31, 2021:

The following table summarizes information for options outstanding and exercisable for the Plans as of December 31, 2021:

 

Outstanding   Exercisable 
        Weighted Average   Weighted       Weighted Average   Weighted 
Exercise       Remaining   Average       Remaining   Average 
Price Range   Number   Contractual Life   Exercise Price   Number   Contractual Life   Exercise Price 
$0.29 - $1.08    241,350    6.25   $0.84    165,600    5.55   $0.86 
$1.09 - $1.20    34,000    3.17   $1.20    34,000    3.17   $1.20 
$6.84 - $11.10    716,200    6.66   $7.20    186,200    4.36   $7.52 
     991,550    6.44   $5.44    385,800    4.77   $4.10 
Non-vested restricted stock activity is as follows for the year ended December 31:

Non-vested restricted stock activity is as follows for the year ended December 31:

 

   2021   2020 
Non-vested restricted stock balance, beginning January 1   80,930     
Non-vested restricted stock granted   362,399    83,930 
Vested restricted stock        
Non-vested restricted stock exercised   (37,962)    
Non-vested restricted stock forfeited/expired       (3,000)
Non-vested restricted stock balance, ending December 31   405,367    80,930 
The weighted average fair value price for the Company’s restricted stock activity for the Plans is as follows for each of the years ended December 31:

The weighted average fair value price for the Company’s restricted stock activity for the Plans is as follows for each of the years ended December 31:

 

   2021   2020 
Restricted stock, beginning  $1.48   $0.00 
Granted  $12.43   $1.46 
Exercised  $1.34   $0.00 
Forfeited/ expired  $   $0.99 
Restricted stock, ending  $11.28   $1.48 
The following is a summary of common stock warrant activity during the year ended December 31, 2021. The Company did not have or issue any warrants during the year ended December 31, 2020.

The following is a summary of common stock warrant activity during the year ended December 31, 2021. The Company did not have or issue any warrants during the year ended December 31, 2020.

 

   Number of
Warrant Shares
   Weighted
Average 
Exercise Price
($)
 
Balance, December 31, 2020      $ 
Granted   2,775,122    12.67 
Exercised   (581,610)   8.24 
Forfeited/ Expired        
Balance, December 31, 2021   2,193,512   $13.85