Stock-Based Compensation - Additional Disclosures (Details) - USD ($)
$ / shares in Units, $ in Thousands |
|
12 Months Ended |
Feb. 10, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Stock-Based compensation |
|
|
|
|
| Weighted-average grant date fair value (in usd per share) |
|
$ 2.80
|
$ 7.06
|
$ 3.03
|
| Unrecognized compensation cost related to nonvested share-based compensation arrangements |
|
$ 10,100
|
|
|
| Intrinsic value of options exercised |
|
3,900
|
$ 5,400
|
$ 800
|
| Increase in common shares authorized (in shares) |
3,000,000
|
|
|
|
| Reclassification from other long-term liabilities to equity |
|
288
|
$ 0
|
$ 0
|
| Equity Incentive Plans |
|
|
|
|
| Stock-Based compensation |
|
|
|
|
| Options granted that were accounted for as liability based awards (in shares) |
|
|
610,675
|
|
| Options outstanding that were accounted for as liability based awards (in shares) |
|
|
597,425
|
|
| Accrued share-based compensation |
|
|
$ 500
|
|
| Change in fair value included in total share based compensation |
|
$ (200)
|
$ 500
|
|
| Number of liability-based awards exercisable (in shares) |
|
|
8,000
|
|
| Reclassification from other long-term liabilities to equity |
$ 300
|
|
|
|
| Stock Options |
|
|
|
|
| Stock-Based compensation |
|
|
|
|
| Expected weighted-average period for recognition of unrecognized stock-based compensation costs (in years) |
|
1 year 5 months 9 days
|
|
|
| Non-Employee Stock Options |
|
|
|
|
| Stock-Based compensation |
|
|
|
|
| Options granted (in shares) |
|
0
|
0
|
15,306
|