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Stock-Based Employee Compensation Plans - (Tables)
 9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of weighted average assumptions used to determine fair values of options granted
Stock Options
The table below summarizes the weighted average assumptions used to determine the fair values of the options granted during the following periods:
 Three Months Ended September 30,Nine Months Ended September 30,
Assumptions with respect to:2020201920202019
Expected volatility— %27 %— %27 %
Risk-free interest rate— %1.35 %— %1.35 %
Expected dividends— %— %— %— %
Expected term (years)0.05.10.05.1
Weighted average fair value of options granted during period$— $1.97 $— $1.97 
Schedule of stock option activity under plans
The following table summarizes the stock option activity under the Company’s equity incentive plans during the nine months ended September 30, 2020 and 2019, respectively.
Number of
Shares		Weighted-
Average
Exercise
Price
Per Share		Number of
Shares		Weighted-
Average
Exercise
Price
Per Share
 20202019
Outstanding – January 1,1,009,466 $6.98 864,330 $6.86 
Granted— — 250,000 7.33 
Exercised(10,728)4.66 (18,250)5.57 
Forfeited/Canceled(406,310)6.98 (7,404)8.15 
Outstanding – September 30,592,428 7.01 1,088,676 6.98 
Options Exercisable – September 30,358,821 $6.74 720,402 $6.68 
Options Vested – September 30,358,821 $6.74 720,402 $6.68 
Schedule of additional information regarding vested and unvested options outstanding
The following table provides additional information regarding the vested and unvested options that were outstanding at September 30, 2020.
Options Outstanding as of September 30, 2020
Options Exercisable
as of September 30, 2020(1)
Exercise PriceVestedUnvestedWeighted
Average
Exercise
Price Per Share		Weighted
Average
Remaining
Contractual
Life (Years)		SharesWeighted
Average
Exercise Price Per Share
$2.97 – $3.99
12,000 — $3.74 1.3212,000 $3.74 
$4.00 – $5.99
16,000 — 4.34 0.5516,000 4.34 
$6.00 – $6.99
203,489 5,950 6.61 4.38203,489 6.60 
$7.00 – $7.99
84,157 200,000 7.30 8.3884,157 7.24 
$8.00 – $8.40
43,175 27,657 8.21 7.3943,175 8.19 
358,821 233,607 $7.01 6.50358,821 $6.74 
(1)The weighted average remaining contractual life of the options that were exercisable as of September 30, 2020 was 4.45 years.
Summary of status of unvested options and changes in number of shares subject to and in weighted average grant date fair values of unvested options
A summary of the status of the unvested options outstanding as of September 30, 2020 and 2019, and changes in the weighted average grant date fair values of the unvested options during the nine months ended September 30, 2020 and 2019, are set forth in the following table.
For the nine months ended September 30,
20202019
Number of
Shares Subject
to Options		Weighted
Average
Grant Date
Fair Value Per Share		Number of
Shares Subject
to Options		Weighted
Average
Grant Date
Fair Value Per Share
Unvested at the beginning of the period334,322 $2.19 275,457 $2.79 
Granted— — 250,000 1.97 
Vested(84,809)2.32 (150,439)2.79 
Forfeited/Canceled(15,906)2.81 (6,744)2.83 
Unvested at the end of the period233,607 2.10 368,274 2.23 
Schedule of restricted stock and stock units activity
Restricted Stock
The following table summarizes the activity related to restricted stock granted, vested and forfeited under our equity incentive plans during the nine months ended September 30, 2020 and 2019.
For the nine months ended September 30,
20202019
Number of SharesAverage Grant Date Fair Value Per ShareNumber of SharesAverage Grant Date Fair Value Per Share
Outstanding at the beginning of the period124,202 $8.44 115,031 $8.04 
Granted63,256 5.57 126,552 8.58 
Vested(49,211)8.47 (93,859)8.07 
Forfeited(28,402)7.99 (7,376)8.77 
Outstanding at the end of the period109,845 $6.89 140,348 $8.47 

    Stock Units
    The following table summarizes the activity related to stock units granted, vested and forfeited under our equity incentive plans during the nine months ended September 30, 2020 and 2019.

For the nine months ended September 30,
20202019
Number of SharesAverage Grant Date Fair Value Per ShareNumber of SharesAverage Grant Date Fair Value Per Share
Outstanding at January 1,100,000 $7.33 — $— 
Granted— — 100,000 7.33 
Vested(25,000)7.33 — — 
Forfeited— — — — 
Outstanding at September 30,75,000 $7.33 100,000 $7.33 
Schedule of compensation expense of non-vested stock options outstanding
We expect that the compensation expense that will be recognized during the periods presented below in respect to stock options, restricted stock, and stock units outstanding at September 30, 2020, will be as follows:
 Estimated Stock Based Compensation Expense Stock OptionsEstimated Stock Based Compensation Expense Restricted StockEstimated Stock Based Compensation Expense Stock UnitsEstimated Stock Based Compensation Expense Total
(Dollars in thousands) 
For the years ending December 31,
Remainder of 2020$43 $112 $61 $216 
2021123 253 244 620 
2022109 119 164 392 
2023101 50 — 151 
2024 and beyond67 11 — 78 
$443 $545 $469 $1,457