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Stock-Based Awards (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period
A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows:
                 
 
December 31, 2019
 
 
Unrecognized Stock-
Based
Compensation
 
  
Average
Remaining
Vesting Period
(Years)
 
Employees and directors
  $
15,190
     
1.61
 
 
 
 
 
 
 
 
 
 
 
Summary of Option Activity
A summary of option activity is as follows: 
                 
 
Options
 
  
Weighted-Average

Exercise Price
 
Outstanding January 1, 2017
   
1,368,247
    $
2.82
 
Granted
   
—  
      
—  
  
Forfeitures/expirations
   
—  
      
—  
  
Exercised
   
(209,419
 )    
3.17
 
                 
Outstanding at December 31, 2017
   
1,158,828
    $
2.75
 
Granted
   
—  
      
—  
  
Forfeitures/expirations
   
—  
      
—  
  
Exercised
   
(588,291
 )    
1.19
 
                 
Outstanding at December 31, 2018
   
570,537
    $
4.36
 
Granted
   
—
      
—
  
Forfeitures/expirations
   
(1
 )    
6.50
 
Exercised
   
(85,000
 )    
0.70
 
                 
Outstanding at December 31, 2019
(1)
    
485,536
    $
4.80
 
                 
 
 
 
 
 
 
 
 
 
 
Summary of Information on Stock Options Outstanding
The following table summarizes information on stock options outstanding and exercisable at December 31, 2019:
                         
 
Options Outstanding and Exercisable
 
Range of Exercise Prices
 
Shares
 
  
Weighted-
Average
Remaining
Life
(Years)
 
  
Weighted-
Average
Exercise
Price
 
$2.25
 
–
 
$2.26
   
115,000
     
0.0
     
2.26
 
$5.05
   
250,000
     
0.9
     
5.05
 
$6.36 – $6.82
   
73,036
     
1.4
     
6.46
 
$7.01 – $7.30
   
47,500
     
1.8
     
7.07
 
                         
   
485,536
     
0.9
    $
4.80
 
                         
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary of Restricted Stock Activity A summary of activity is as follows:
                                                 
 
RSAs
   
RSUs
   
PRSUs
 
 
Shares
 
  
Weighted
Average
Grant Date
Fair Value
 
  
Shares
 
  
Weighted
Average
Grant Date
Fair Value
 
  
Shares
 
  
Weighted
Average
Grant Date
Fair Value
 
Unvested Balance at January 1, 2017
   
2,436,454
    $
13.58
     
—  
     $
—  
      
—  
     $
—  
  
Granted
   
1,068,550
     
10.51
      
7,231
     
10.49
      
—  
      
—  
  
Vested
   
(1,641,870
 )    
13.64
      
—  
      
—  
      
—  
      
—  
  
Forfeited
   
(46,468
 )    
12.36
      
(1,553
 )    
10.83
      
—  
      
—  
  
                                                 
Unvested Balance at December 31, 2017
   
1,816,666
    $
11.75
     
5,678
    $
10.40
     
—  
     $
—  
  
Granted
   
903,231
     
11.77
      
7,152
     
12.21
      
—  
      
—  
  
Vested
   
(618,516
 )    
12.67
      
(1,890
 )    
10.40
      
—  
      
—  
  
Forfeited
   
(144,279
 )    
11.83
      
(1,446
 )    
11.97
      
—  
      
—  
  
                                                 
Unvested Balance at December 31, 2018
   
1,957,102
    $
11.47
     
9,494
    $
11.52
     
—
     $
—
  
Granted
   
2,794,703
     
6.16
      
35,283
     
6.45
      
270,872
(1)
 		    
6.24
  
Vested
   
(1,053,980
 )    
11.25
      
(5,499
 )    
9.85
      
—
      
—
  
Forfeited
   
(453,267
 )    
9.09
      
—
      
—
      
(38,262
)
    
6.24
  
                                                 
Unvested Balance at December 31, 2019
   
3,244,558
    $
7.29
     
39,278
    $
7.20
     
232,610
(1)
 		   $
6.24