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Share-based Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Nonvested Restricted Stock Shares Activity [Table Text Block]

Weighted

Number of

Average Grant

    

Units

    

Date Fair Value

Unvested at December 31, 2020

 

1,515,876

$

6.50

Granted

 

1,120,169

9.30

Vested

 

(565,218)

 

7.08

Forfeited

 

(146,434)

 

7.59

Unvested at September 30, 2021

 

1,924,393

$

7.90

Share-based Payment Arrangement, Option, Activity [Table Text Block]

Weighted

Number of

Average Grant

    

Units

    

Date Fair Value

Unvested at December 31, 2020

 

203,757

$

4.96

Vested

(78,974)

5.12

Unvested at September 30, 2021

 

124,783

$

4.86

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

Number of

Weighted

    

Units

    

Average

Unvested at December 31, 2020

 

625,030

$

2.15

Vested

 

(164,990)

2.15

Unvested at September 30, 2021

 

460,040

$

2.15