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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
The following table presents the total stock-based compensation expense, which is included in selling, general and administrative expenses (in thousands):
Years Ended December 31,
202220212020
Restricted share expense$2,683 $4,491 $1,687 
Stock option and SARs expense1,142 1,913 923 
Total stock-based compensation expense$3,825 $6,404 $2,610 
Tax benefit related to stock-based compensation$857 $2,234 $1,652 
Nonvested Restricted Stock Shares Activity
The following table summarizes the Company’s restricted share activity, excluding the Company’s employee stock purchase plan:
Number of
shares		Weighted
average
grant
date fair
value
Unvested at December 31, 2021290,942 $15.61 
Granted340,677 9.44 
Vested(25,583)15.43 
Vested shares forgone to satisfy minimum statutory withholding(16,982)15.43 
Forfeitures(54,974)14.11 
Unvested at December 31, 2022534,080 $11.85 
Year Ended December 31,
202220212020
Weighted average grant date fair value of awards granted$9.44 $18.85 $10.12 
Total fair value of shares vested$260,112 $920,125 $367,273 
Total fair value of shares forgone to satisfy minimum statutory withholding$172,662 $32,282 $62,479 
Share-based Payment Arrangement, Performance Shares, Activity
The following table summarizes the Company’s PSU activity:
Number of sharesWeighted
average
grant
date fair value
Unvested at December 31, 2021239,976 $14.74 
Granted53,864 8.58 
Performance adjustment upon vesting24,675 11.68 
Vested(80,267)15.19 
Vested shares forgone to satisfy minimum statutory withholding(59,730)15.19 
Forfeitures(53,401)18.18 
Unvested at December 31, 2022125,117 $9.51 
Year Ended December 31,
202220212020
Weighted average grant date fair value of awards granted$8.58 $19.50 $9.06 
Total fair value of shares vested$680,026 $1,335,053 N/A
Total fair value of shares forgone to satisfy minimum statutory withholding$506,036 $1,078,747 N/A
Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity The following table summarizes the activity relating to the Company’s ESPP program:
Years Ended December 31,
202220212020
Compensation expense$229,064 $173,561 $108,589 
Shares of stock sold to employees60,673 31,624 30,012 
Weighted average fair value per ESPP award$11.53 $16.95 $7.43 
Share-based Payment Arrangement, Option, Activity
The following tables detail the various stock option activity:
2014 Plan (Options)Number
of Authorized
Shares		Weighted-
Average Exercise
Price		Weighted-
Average
Remaining
Contractual Term (in Years)		Aggregate
Intrinsic Value
Outstanding at December 31, 20211,731,841 $4.92 3.93$21,051,101 
Granted— — 
Exercised(413,786)2.43 
Exercised shares forgone to satisfy minimum statutory withholding(60,006)2.00 
Cashless exercise(42,655)2.00 
Forfeitures and expirations(40,667)12.14 
Outstanding at December 31, 20221,174,727 $5.76 3.95$4,463,307 
Exercisable at December 31, 20221,085,060 $5.18 3.73$4,431,477 
Aggregate Intrinsic Value = Excess of market value over the option exercise price of all in-the-money stock options.
2021 Plan (Options)Number
of Authorized
Shares		Weighted-
Average Exercise
Price		Weighted-
Average
Remaining
Contractual Term (in Years)		Aggregate
Intrinsic Value
Outstanding at December 31, 2021273,269 $19.47 9.38$— 
Granted332,008 8.82 
Forfeitures and expirations(60,478)15.59 
Outstanding at December 31, 2022544,799 $13.41 8.93$27,396 
Exercisable at December 31, 2022 (a)156,096 $19.48 8.38$— 
(a) Aggregate Intrinsic Value - no exercisable options were in-the-money as of December 31, 2022
Aggregate Intrinsic Value = Excess of market value over the option exercise price of all in-the-money stock options.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following is the average fair value per share estimated on the date of grant and the assumptions used for options granted:
Years Ended December 31,
Stock Options:202220212020
Expected volatility
51% to 53%
43% to 46%
42% to 51%
Risk free interest rate
1.71% to 3.01%
0.31% to 0.54%
0.20% to 1.56%
Expected lives at date of grant (in years)3.733.623.25
Weighted average fair value of options granted$3.67$6.56$3.87
Total intrinsic value of options exercised$3,762,978 $4,248,401 $3,377,730