Stock-Based Compensation - Option Activity (Details)
|
9 Months Ended |
|
Sep. 30, 2020
USD ($)
$ / shares
shares
|
|---|
| Options |
|
| Outstanding, beginning of period (in shares) | shares |
4,764,167
|
| Granted (in shares) | shares |
124,000
|
| Exercised (in shares) | shares |
366
|
| Forfeited (in shares) | shares |
(129,757)
|
| Expired (in shares) | shares |
(2,325,391)
|
| Outstanding, end of period (in shares) | shares |
2,432,653
|
| Weighted Average Exercise Price |
|
| Outstanding, beginning of period (in dollars per share) | $ / shares |
$ 15.99
|
| Granted (in dollars per share) | $ / shares |
2.13
|
| Exercised (in dollars per share) | $ / shares |
0.25
|
| Forfeited (in dollars per share) | $ / shares |
13.15
|
| Expired (in dollars per share) | $ / shares |
16.37
|
| Outstanding, end of period (in dollars per share) | $ / shares |
$ 15.07
|
| Exercisable (in shares) | shares |
1,955,295
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares |
$ 15.78
|
| Outstanding, weighted average remaining term |
6 years 7 months 6 days
|
| Exercisable, weighted average remaining term |
6 years 2 months 12 days
|
| Outstanding, aggregate intrinsic value | $ |
$ 22,000
|
| Exercisable, aggregate intrinsic value | $ |
$ 0
|