Annual report pursuant to Section 13 and 15(d)

Common Stock, Stock-Based Awards and Warrants - Performance Based Restricted Units Narrative (Details)

v3.19.1
Common Stock, Stock-Based Awards and Warrants - Performance Based Restricted Units Narrative (Details) - PSUs
1 Months Ended 12 Months Ended
Jun. 25, 2018
d
$ / shares
Oct. 31, 2016
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance Period (in years)   3 years    
Debt instrument, convertible, stock price trigger $ 4.00      
Consecutive trading days | d 45      
Non-options granted (in shares) | shares     1,695,835 526,100
Granted (in dollars per share)     $ 2.01 $ 2.81
Risk-free interest rate (as a percent)     2.75% 1.89%
Nonvested shares outstanding | shares     2,139,745 683,320
PSUs, March 27, 2020        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 50.00%      
PSUs, March 27, 2021        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 25.00%      
PSUs, March 27, 2022        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 25.00%      
Executive Chairman        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 25.00%      
Debt instrument, convertible, stock price trigger $ 4.00      
Consecutive trading days | d 45