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Stock Incentive Plans - Narrative (Details) - $ / shares
12 Months Ended
Dec. 15, 2016
Nov. 07, 2016
Oct. 15, 2014
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Chief Financial Officer            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, options (in shares)   280,000        
Chief Financial Officer | Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted (in shares)   233,863        
Management Incentive Plan 2014            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of common stock for distribution     2.00%      
Vesting period     4 years      
Vesting Year     25.00%      
Management Incentive Plan 2014 | Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested (in shares)       1,432 133,452  
Forfeited (in shares)       83    
Shares outstanding (in shares)       50,625 52,140  
Weighted average grant date fair value (in dollars per share)       $ 5.90 $ 42.19  
Management Incentive Plan 2014 | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options vested but not exercised (in shares)       12,875 9,960  
Nonvested (in shares)       0    
Not vested but expected to vest (in shares)       140,000 2,915  
Vested and unexercised (in dollars per share)       $ 4.28    
Options vested or expected to vest (in shares)         210,000  
Management Incentive Plan 2014 | Chief Financial Officer | Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares outstanding (in shares)       233,863 233,863  
Weighted average grant date fair value (in dollars per share)       $ 4.24 $ 4.24  
Granted (in shares)   233,863        
Management Incentive Plan 2014 | Chief Financial Officer | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options vested but not exercised (in shares)       140,000    
Granted, options (in shares)   280,000        
Vested, options (in shares)       70,000 70,000  
Management Incentive Plan 2014 | With Different Striking Prices            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of common stock for distribution     5.50%      
2016 Equity Compensation Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized (in shares) 5,348,613          
Shares that can be granted per employee (in shares) 3,000,000          
Maximum number of options and stock appreciation rights that can be granted per employee in one year (in shares) 3,000,000          
Maximum shares to be granted to non employee director in one year (in shares) 500,000          
2016 Equity Compensation Plan | Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Forfeited (in shares)         10,750  
Shares outstanding (in shares)       1,212,465 1,430,925 993,925
Weighted average grant date fair value (in dollars per share)       $ 4.79 $ 5.70 $ 5.90
2016 Equity Compensation Plan | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options vested but not exercised (in shares)       525,501 828,085  
Vested and unexercised (in dollars per share)       $ 4.55    
Vested, options (in shares)         828,085  
Cumulative options vested or expected to vest (in shares)       1,353,586    
Options vested or expected to vest (in shares)       651,835 1,180,086  
Minimum | Management Incentive Plan 2014 | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise Price (in dollars per share)       $ 360    
Minimum | 2016 Equity Compensation Plan | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise Price (in dollars per share)       4.28    
Maximum | Management Incentive Plan 2014 | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise Price (in dollars per share)       505    
Maximum | 2016 Equity Compensation Plan | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise Price (in dollars per share)       $ 5.56