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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2021
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, 2020144,006 $13.00 8.77 $— 
Granted154,707 6.16 — — 
  Less: Forfeited21,777 10.49 — — 
  Less: Expired2,503 16.25 — — 
Less: Exercised
— — — — 
Outstanding as of June 30, 2021
274,433 $9.31 9.12 $— 
Vested as of June 30, 2021(1)
111,324 $15.10 8.00 $— 
Exercisable as of June 30, 2021
58,688 $15.05 8.00 $— 
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, 2020259,006 $10.06 
Granted 288,026 6.04 
Less: Forfeited82,381 9.76 
Less: Vested 80,072 10.00 
Outstanding as of June 30, 2021384,579 $7.13 
Share-based Payment Arrangement, Activity
The following table presents our total stock-based compensation expense:

Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Employee stock-based compensation expense
     Pre-tax $62 $(52)$225 $474 
     Post-tax (1)
49 (41)178 374 
Director stock-based compensation expense
     Pre-tax 80 133 177 307 
     Post-tax (1)
63 105 140 243 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The following weighted-average assumptions were used to value the stock options granted:
2021
Expected annual dividend yield1.97  %
Expected volatility42.10  %
Risk-free interest rate2.20  %
Expected term6