Annual report pursuant to Section 13 and 15(d)

Common Stock, Stock-Based Awards and Warrants - Phantom Stock Options (Details)

v3.19.1
Common Stock, Stock-Based Awards and Warrants - Phantom Stock Options (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
d
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Cash-settled phantom stock options | $ $ 6,700
Phantom stock options | $ $ 1,564
Phantom stock Options (Level 3)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Non-options granted (in shares) | shares 6,765,761
Granted (in dollars per share) $ 1.07
Canceled (in shares) | shares (461,794)
Nonvested shares outstanding | shares 5,974,114
$4 Goal Stock Options | Phantom stock Options (Level 3)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Estimated term (in years) P5Y
Debt instrument, convertible, stock price trigger $ 4.00
Consecutive trading days | d 45
$4 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2020  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 50.00%
$4 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2021  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 25.00%
$4 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2022  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 25.00%
$8 Goal Stock Options | Phantom stock Options (Level 3)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Estimated term (in years) P7Y
Debt instrument, convertible, stock price trigger $ 8.00
Consecutive trading days | d 45
$8 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2020  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 50.00%
$8 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2021  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 50.00%
Executive Chairman | $4 Goal Stock Options | Phantom stock Options (Level 3)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Debt instrument, convertible, stock price trigger $ 4.00
Consecutive trading days | d 45
Executive Chairman | $4 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2020  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 25.00%
Executive Chairman | $4 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2019  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 25.00%
Executive Chairman | $4 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, June 25, 2018  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 50.00%
Executive Chairman | $8 Goal Stock Options | Phantom stock Options (Level 3)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Debt instrument, convertible, stock price trigger $ 8.00
Consecutive trading days | d 45
Executive Chairman | $8 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2020  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 25.00%
Executive Chairman | $8 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, March 27, 2019  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 25.00%
Executive Chairman | $8 Goal Stock Options | Phantom stock Options (Level 3) | Phantom Stock Options, June 25, 2018  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting percentage 50.00%