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Stock-Based Compensation and Other Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2020
Stock-Based Compensation and Other Benefit Plans [Abstract] |
Summary of Stock-Based Compensation |
| Three Months Ended March 31,
| 2020 |  | 2019
| (in thousands)
Stock-based compensation - equity awards | $ | 145 |  | $ | 27
Stock-based compensation - liability awards |  | (2,714) |  |  | 1,696
Total stock-based compensation | $ | (2,569) |  | $ | 1,723
Stock Option Valuation Assumptions |
| Three Months Ended March 31, |
| 2020 |  | 2019 |
Weighted average exercise price - ($/share) |  | N/A |  | $ | 1.58 |
Expected life in years |  | N/A |  |  | 3.5 |
Average expected volatility |  | N/A |  |  | 72.93 | %
Risk-free interest rate |  | N/A |  |  | 2.52 | %
Weighted average grant date fair value - ($/share) |  | N/A |  | $ | 1.23 |
Stock Option Activity |
|  | Number of Shares Underlying Options |  | Weighted Average Exercise Price Per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value
|  | (in thousands) |  |  |  |  |  | (in years) |  |  | (in thousands)
Outstanding at January 1, 2020 |  | 2,834 |  | $ | 1.55 |  |  |  |  |  |
Granted |  | — |  |  | — |  |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |  |
Unvested shares forfeited |  | — |  |  | — |  |  |  |  |  |
Vested shares expired |  | (120) |  |  | 4.98 |  |  |  |  |  |
Outstanding at March 31, 2020 |  | 2,714 |  |  | 1.39 |  |  | 2.64 |  | $ | 17
Exercisable at March 31, 2020 |  | 2,043 |  |  | 1.28 |  |  | 2.42 |  | $ | 11
Summary of Non Vested Awards |
|  | Restricted Stock |  | Weighted Average Grant Price
|  | (in thousands) |  |  |
Non-vested shares outstanding at January 1, 2020 |  | 343 |  | $ | 1.52
Awards granted |  | — |  |  | —
Awards vested |  | (125) |  |  | 1.37
Awards forfeited |  | — |  |  | —
Non-vested shares outstanding at March 31, 2020 |  | 218 |  |  | 1.61
SAR Activity |
|  | Number of Shares Underlying SARs |  | Weighted Average Exercise Price Per Share |  |  | Term |  | Aggregate Intrinsic Value
|  | (in thousands) |  |  |  |  |  | (in years) |  |  | (in thousands)
Outstanding at January 1, 2020 |  | 3,418 |  | $ | 1.30 |  |  |  |  |  |
Granted |  | — |  |  | — |  |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |  |
Unvested shares forfeited |  | — |  |  | — |  |  |  |  |  |
Vested shares expired |  | — |  |  | — |  |  |  |  |  |
Outstanding at March 31, 2020 |  | 3,418 |  |  | 1.30 |  |  | 2.96 |  | $ | 73
Exercisable at March 31, 2020 |  | 1,813 |  |  | 1.13 |  |  | 2.74 |  | $ | 47

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