| Schedule of Debt Instruments Senior Secured Note | Based on the then existing market conditions, we completed repurchases of our 6.75% Senior Secured Notes at amounts less than face value as follows: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | (Dollars in thousands) |  |  
| January 30, 2020 |  | $ | 2,250 |  |  | $ | 2,194 |  |  |  | 97.50 | % |  | $ | 34 |  |  | $ | 22 |  |  
| January 27, 2020 |  |  | 1,245 |  |  |  | 1,198 |  |  |  | 96.25 | % |  |  | 20 |  |  |  | 27 |  |  
| December 27, 2019 |  |  | 3,090 |  |  |  | 2,874 |  |  |  | 93.00 | % |  |  | 48 |  |  |  | 167 |  |  
| November 27, 2019 |  |  | 5,183 |  |  |  | 4,548 |  |  |  | 87.75 | % |  |  | 82 |  |  |  | 553 |  |  
| November 15, 2019 |  |  | 3,791 |  |  |  | 3,206 |  |  |  | 84.58 | % |  |  | 61 |  |  |  | 524 |  |  
| March 28, 2019 |  |  | 2,000 |  |  |  | 1,830 |  |  |  | 91.50 | % |  |  | 37 |  |  |  | 134 |  |  
| March 28, 2019 |  |  | 2,300 |  |  |  | 2,125 |  |  |  | 92.38 | % |  |  | 42 |  |  |  | 133 |  |  
| February 20, 2019 |  |  | 125 |  |  |  | 114 |  |  |  | 91.25 | % |  |  | 2 |  |  |  | 9 |  |  
| February 19, 2019 |  |  | 350 |  |  |  | 319 |  |  |  | 91.25 | % |  |  | 7 |  |  |  | 24 |  |  
| February 12, 2019 |  |  | 1,325 |  |  |  | 1,209 |  |  |  | 91.25 | % |  |  | 25 |  |  |  | 91 |  |  
| January 10, 2019 |  |  | 570 |  |  |  | 526 |  |  |  | 92.25 | % |  |  | 9 |  |  |  | 35 |  |  
| December 21, 2018 |  |  | 2,000 |  |  |  | 1,835 |  |  |  | 91.75 | % |  |  | 38 |  |  |  | 127 |  |  
| December 21, 2018 |  |  | 1,850 |  |  |  | 1,702 |  |  |  | 92.00 | % |  |  | 35 |  |  |  | 113 |  |  
| December 21, 2018 |  |  | 1,080 |  |  |  | 999 |  |  |  | 92.50 | % |  |  | 21 |  |  |  | 60 |  |  
| November 17, 2018 |  |  | 1,500 |  |  |  | 1,357 |  |  |  | 90.50 | % |  |  | 29 |  |  |  | 114 |  |  
| May 4, 2018 |  |  | 4,000 |  |  |  | 3,770 |  |  |  | 94.25 | % |  |  | 86 |  |  |  | 144 |  |  
| April 10, 2018 |  |  | 4,000 |  |  |  | 3,850 |  |  |  | 96.25 | % |  |  | 87 |  |  |  | 63 |  |  
| April 9, 2018 |  |  | 2,000 |  |  |  | 1,930 |  |  |  | 96.50 | % |  |  | 43 |  |  |  | 27 |  |  
|  |  |   |   |  |  |   |   |  |  |  |  |  |  |   |   |  |  |   |   |  |  
|  |  | $ | 38,659 |  |  | $ | 35,586 |  |  |  |  |  |  | $ | 706 |  |  | $ | 2,367 |  |  
|  |  |   |   |  |  |   |   |  |  |  |  |  |  |   |   |  |  |   |   |  |  | 
| Long-Term Debt | Long-term debt consisted of the following: 
|  |  |  |  |  |  |  |  |  |  
|  |  | As of December 31, |  |  
|  |  | 2019 |  |  | 2020 |  |  
|  |  | (Dollars in thousands) |  |  
| 6.75% Senior Secured Notes |  | $ | 219,836 |  |  | $ | 216,341 |   |  
| Less unamortized debt issuance costs based on imputed interest rate of 7.08% |  |  | (3,368 | ) |  |   | (2,577 | )  |  
|  |  |   |   |  |  |   |   |  |  
| 6.75% Senior Secured Notes net carrying value |  |  | 216,468 |  |  |   | 213,764 |   |  
|  |  |   |   |  |  |   |   |  |  
| Asset-Based Revolving Credit Facility principal outstanding |  |  | 12,426 |  |  |   | 5,000 |   |  
|  |  |   |   |  |  |   |   |  |  
| Long-term debt less unamortized debt issuance costs |  |  | 228,894 |  |  |   | 218,764 |   |  
|  |  |   |   |  |  |   |   |  |  
|  |  |  | (12,426 | ) |  |   | (5,000 | )  |  
|  |  |   |   |  |  |   |   |  |  
| Long-term debt less unamortized debt issuance costs, net of current portion |  | $ | 216,468 |  |  | $ | 213,764 |   |  
|  |  |   |   |  |  |   |   |  |  |