Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended |
Sep. 30, 2017 | Sep. 30, 2016 |
Stock-based compensation | | |
Stock-based compensation expense | $ 1,818 | $ 2,373 |
Stock Options | | |
Options outstanding | | |
Outstanding at beginning of period | 3,705,893 | |
Granted in period | 0 | |
Exercised in period | 0 | |
Forfeited in period | (89,630) | |
Expired in period | (847,898) | |
Outstanding at end of period | 2,768,365 | |
Vested and expected to vest at end of period | 2,768,365 | |
Excisable at end of period | 2,003,764 | |
Weighted average exercise price | | |
Outstanding at beginning of period | $ 7.72 | |
Granted in period | 0 | |
Exercised in period | 0 | |
Forfeited in period | 7.13 | |
Expired in period | 11.07 | |
Outstanding at end of period | 6.72 | |
Vested and expected to vest at end of period | 6.72 | |
Exercisable at end of period | $ 7.59 | |
Weighted average remaining contractual term | | |
Outstanding | 5 years 1 month 6 days | |
Vested and expected to vest | 5 years 1 month 6 days | |
Exercisable | 3 years 8 months 23 days | |
Additional disclosures | | |
Unrecognized compensation costs | $ 700 | |
Unrecognized compensation costs, recognition period | 1 year 9 months 26 days | |
Expiration period | 10 years | |
Stock Options | First anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Stock Options | Second anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Stock Options | Third anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Stock Options | Fourth anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Cash Stock Appreciation Rights | | |
Outstanding | | |
Outstanding at beginning of period | 0 | |
Granted in period | 866,196 | |
Vested in period | 0 | |
Forfeited in period | 0 | |
Outstanding at end of period | 866,196 | |
Weighted average grant date fair value | | |
Outstanding at beginning of period | $ 0 | |
Granted in period | 0.97 | |
Vested in period | 0 | |
Forfeited in period | 0 | |
Outstanding at end of period | $ 0.97 | |
Additional disclosures | | |
Unrecognized compensation costs | $ 500 | |
Unrecognized compensation costs, recognition period | 3 years 8 months 23 days | |
Cash Stock Appreciation Rights | First anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Cash Stock Appreciation Rights | Second anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Cash Stock Appreciation Rights | Third anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Cash Stock Appreciation Rights | Fourth anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Unvested Shares | | |
Outstanding | | |
Outstanding at beginning of period | 945,252 | |
Granted in period | 1,336,060 | |
Vested in period | (405,241) | |
Forfeited in period | (132,468) | |
Outstanding at end of period | 1,743,603 | |
Weighted average grant date fair value | | |
Outstanding at beginning of period | $ 3.76 | |
Granted in period | 0.98 | |
Vested in period | 4.13 | |
Forfeited in period | 2.76 | |
Outstanding at end of period | $ 1.61 | |
Additional disclosures | | |
Unrecognized compensation costs | $ 2,300 | |
Unrecognized compensation costs, recognition period | 1 year 11 months 16 days | |
Unvested Shares | First anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 33.33% | |
Unvested Shares | Second anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 33.33% | |
Unvested Shares | Third anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 33.33% | |
Phantom Stock Units | | |
Outstanding | | |
Outstanding at beginning of period | 531,820 | |
Granted in period | 560,000 | |
Vested in period | (125,046) | |
Forfeited in period | (112,360) | |
Outstanding at end of period | 854,414 | |
Weighted average grant date fair value | | |
Outstanding at beginning of period | $ 2.69 | |
Granted in period | 0.97 | |
Vested in period | 2.69 | |
Forfeited in period | 2.51 | |
Outstanding at end of period | $ 1.59 | |
Additional disclosures | | |
Unrecognized compensation costs | $ 800 | |
Unrecognized compensation costs, recognition period | 3 years 3 months 26 days | |
Phantom Stock Units | First anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Phantom Stock Units | Second anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Phantom Stock Units | Third anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Phantom Stock Units | Fourth anniversary, vesting percentage | | |
Additional disclosures | | |
Vesting percentage | 25.00% | |
Performance Stock Units | | |
Outstanding | | |
Outstanding at beginning of period | 844,315 | |
Granted in period | 711,268 | |
Settled in period | 0 | |
Forfeited in period | (104,946) | |
Outstanding at end of period | 1,450,637 | |
Weighted average grant date fair value | | |
Outstanding at beginning of period | $ 2.56 | |
Granted in period | 0.99 | |
Vested in period | 0 | |
Forfeited in period | 4.79 | |
Outstanding at end of period | $ 1.63 | |
Additional disclosures | | |
Unrecognized compensation costs | $ 1,300 | |
Unrecognized compensation costs, recognition period | 1 year 10 months 24 days | |
Performance Stock Units | Minimum | | |
Additional disclosures | | |
Vesting percentage | 0.00% | |
Performance Stock Units | Maximum | | |
Additional disclosures | | |
Vesting percentage | 100.00% | |
Cash Performance Stock Units | | |
Outstanding | | |
Outstanding at beginning of period | 444,005 | |
Granted in period | 1,098,871 | |
Settled in period | 0 | |
Forfeited in period | (37,784) | |
Outstanding at end of period | 1,505,092 | |
Weighted average grant date fair value | | |
Outstanding at beginning of period | $ 2.69 | |
Granted in period | 1.01 | |
Vested in period | 0 | |
Forfeited in period | 2.69 | |
Outstanding at end of period | $ 1.46 | |
Additional disclosures | | |
Unrecognized compensation costs | $ 1,100 | |
Cash Performance Stock Units | Minimum | | |
Additional disclosures | | |
Vesting percentage | 0.00% | |
Cash Performance Stock Units | Maximum | | |
Additional disclosures | | |
Vesting percentage | 100.00% | |