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Stock-Based Compensation and Other Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 3 Months Ended | 6 Months Ended
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Jun. 06, 2019 | May 02, 2019 | Apr. 01, 2019 | Feb. 28, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  | $ (100) | $ 2,400 | $ 1,620 | $ 2,756
Payments to settle stock appreciation rights |  |  |  |  |  |  | 261 | 82
Cash proceeds from stock options exercised |  |  |  |  |  |  | $ 100 | $ 400
Options granted |  |  |  |  |  |  | 923,000 |
Options granted, weighted average exercise price |  |  |  |  |  |  | $ 2.08 |
Severance cost as percentage of target bonus |  | 75.00% |  |  |  |  |  |
Director [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options granted | 257,228 |  |  |  |  |  |  |
Options granted, weighted average exercise price | $ 1.43 |  |  |  |  |  |  |
Employees [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options granted |  |  | 44,163 | 622,140 |  |  |  |
Options granted, weighted average exercise price |  |  | $ 2.29 |  |  |  |  |
Long-Term Incentive Plan, 2014 [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock options, authorized |  |  |  |  | 373 |  | 373 |
Stock Option [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award granted life |  |  |  |  |  |  | 5 years |
Awards, vesting period |  |  |  | 3 years |  |  |  |
Options granted, weighted average exercise price |  |  |  | $ 2.33 |  |  |  |
Shares withheld to satisfy tax withholding obligations |  |  |  |  |  |  | 13,875 |
Treasury stock reissued |  |  |  |  |  |  | 62,235 |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Awards, vesting period |  |  | 3 years | 3 years |  |  | 3 years |
Shares withheld to satisfy tax withholding obligations |  |  |  |  | 30,573 | 35,265 | 30,573 | 35,265
Other awards granted | 111,888 |  | 22,926 | 174,464 |  |  | 309,000 |
Other awards granted, weighted average exercise price | $ 1.43 |  | $ 2.29 | $ 2.33 |  |  | $ 2.00 |
Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award granted life | 5 years |  |  | 5 years |  |  |  |
Awards, vesting period | 3 years |  |  | 3 years |  |  |  |
Other awards granted | 196,892 |  |  | 951,699 |  |  | 1,148,000 |
Other awards granted, weighted average exercise price | $ 1.72 |  |  | $ 2.33 |  |  | $ 2.23 |
Minimum |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Severance cost as percentage of salary |  | 50.00% |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Severance cost as percentage of salary |  | 100.00% |  |  |  |  |  |

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