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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity
The following table presents certain information related to the activity of our non-vested stock option grants:
Number of Stock OptionsWeighted Average Exercise PricesWeighted Average Remaining Contractual Term (years)Aggregate Intrinsic Value
Outstanding as of December 31, 20211,147,215 $4.80 9.49 $792,000 
Granted— — — — 
  Less: Forfeited— — — — 
  Less: Expired— — — — 
Less: Exercised
— — — — 
Outstanding as of March 31, 2022
1,147,215 $4.80 9.24 $— 
Vested as of March 31, 2022(1)
120,638 $15.85 7.14 $— 
Exercisable as of March 31, 2022
68,003 $15.85 7.14 $— 
(1) The vested shares are calculated based on all vested shares at March 31, 2022, inclusive of those that have since expired. The weighted average exercise prices and weighted-average remaining contractual term is calculated based on only vested shares that are outstanding and exercisable at March 31, 2022.
Schedule of Nonvested Share Activity
The following table presents certain information related to the activity of our non-vested common stock grants:
Number of Restricted SharesWeighted Average Grant Date Fair Value
Outstanding as of December 31, 2021336,596 $6.99 
Granted 114,866 3.59 
Less: Forfeited224 10.36 
Less: Vested 22,728 8.25 
Outstanding as of March 31, 2022
428,510 $6.01 
Share-based Payment Arrangement, Activity
The following table presents our total stock-based compensation expense:
Three Months Ended March 31,
20222021
Employee stock-based compensation expense
     Pre-tax $390 $163 
     Post-tax (1)
308 129 
Director stock-based compensation expense
     Pre-tax 62 97 
     Post-tax (1)
49 77 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The following weighted-average assumptions were used to value the stock options granted:
2022
Expected annual dividend yield1.23  %
Expected volatility43.87  %
Risk-free interest rate1.81  %
Expected term6 years