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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2020
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Company's Stock Option Activity
Following is a summary of the Company’s stock option activity for the three years ended December 31, 2020:
 
   
Number of
Options
   
Weighted Average
Exercise Price
 
Outstanding at December 31, 2017
   674,000   $3.43 
Granted
   495,000    6.72 
Exercised
   (52,000   2.08 
Cancelled / forfeited
   (6,000   3.20 
   
 
 
      
Outstanding at December 31, 2018
   1,111,000    4.95 
Granted
   683,000    6.48 
Exercised
   (6,000   1.18 
Cancelled / forfeited
   (67,000   6.35 
   
 
 
      
Outstanding at December 31, 2019
   1,721,000    5.52 
Granted
   800,000    15.49 
Exercised
   (305,000   4.36 
Cancelled / forfeited
   (207,000   8.04 
   
 
 
      
Outstanding at December 31, 2020
   2,009,000   $9.40 
   
 
 
   
 
 
 
Summary of Information Regarding the Company's Outstanding and Exercisable Stock Options
The table below summarizes information regarding the Company’s outstanding and exercisable stock options as of December 31, 2020:
 
Range of Exercise Prices:
  
Options
Outstanding
   
Weighted Average
Remaining
Contractual Life
(in years)
   
Weighted Average
Exercise Price
 
$0.01 to $4.00
   355,000    5.2   $3.56 
$4.01 to $8.00
   904,000    8.0    6.65 
$8.01 to $12.00
   —      —      —   
$12.01 to $16.00
   750,000    9.1    15.49 
   
 
 
           
   
 
2,009,000
 
   7.9   
$
9.40
 
   
 
 
   
 
 
   
 
 
 
 
Range of Exercise Prices:
  
Options
Exercisable
   
Weighted Average
Remaining
Contractual Life
(in years)
   
Weighted Average
Exercise Price
 
$0.01 to $4.00
   222,000    5.2   $3.59 
$4.01 to $8.00
   164,000    7.8    6.74 
$8.01 to $12.00
   —      —      —   
$12.01 to $16.00
   —      —      —   
   
 
 
           
   
 
386,000
 
   6.3   
$
4.93
 
   
 
 
   
 
 
   
 
 
 
Summary of Assumptions with Respect to the Black-Scholes Option Pricing Model
The Company used the following average assumptions with respect to the Black-Scholes option pricing model for Mastech Digital stock options issued during 2020, 2019 and 2018.
   
Years Ended December 31,
 
   
2020
  
2019
  
2018
 
Stock option grants:
          
Weighted-average risk-free interest rate
   1.4  2.4  2.8
Weighted-average dividend yield
   0.0  0.0  0.0
Expected volatility
   52.7  49.7  50.6
Expected term (in years)
   3.9   5.0   5.0 
Weighted-average fair value
  $6.36  $2.95  $3.15 
Summary of Mastech's Restricted Stock Unit Activity
Following is a summary of Mastech’s restricted stock activity for the three years ended December 31, 2020:
 
   
Years Ended December 31,
 
   
2020
   
2019
   
2018
 
Beginning outstanding balance
   33,285    34,380    30,500 
Awarded
   11,475    16,365    25,380 
Released
   (13,917   (17,460   (21,500
Forfeited
   —      —      —   
   
 
 
   
 
 
   
 
 
 
Ending outstanding balance
   30,843    33,285    34,380