Stock-Based Compensation - Option Activity (Details)
|
9 Months Ended |
|
Sep. 30, 2019
USD ($)
$ / shares
shares
|
|---|
| Options |
|
| Outstanding, beginning of period (in shares) | shares |
4,559,334
|
| Granted (in shares) | shares |
326,000
|
| Exercised (in shares) | shares |
0
|
| Forfeited (in shares) | shares |
(65,336)
|
| Expired (in shares) | shares |
(15,998)
|
| Outstanding, end of period (in shares) | shares |
4,804,000
|
| Exercisable (in shares) | shares |
2,654,623
|
| Weighted Average Exercise Price |
|
| Outstanding, beginning of period (in dollars per share) | $ / shares |
$ 16.55
|
| Granted (in dollars per share) | $ / shares |
9.56
|
| Exercised (in dollars per share) | $ / shares |
0
|
| Forfeited (in dollars per share) | $ / shares |
16.90
|
| Expired (in dollars per share) | $ / shares |
17.88
|
| Outstanding, end of period (in dollars per share) | $ / shares |
16.07
|
| Exercisable (in dollars per share) | $ / shares |
$ 16.14
|
| Outstanding, weighted average remaining term |
7 years 6 months
|
| Exercisable, weighted average remaining term |
7 years 2 months 12 days
|
| Outstanding, aggregate intrinsic value | $ |
$ 0
|
| Exercisable, aggregate intrinsic value | $ |
$ 0
|