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Related Party Transactions - Remy W. Trafelet, Henry R. Slack and George R. Brokaw (Details) - USD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2016 | Dec. 31, 2017
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Related Party Transaction [Line Items] |  |
Period of consecutive trading days | 20 days |
Period following an executive's termination of employment for a number of reasons | 18 months |
Period equivalent to severance cost payment | 18 months |
Period of post-termination noncompetition and customer and employee nonsolicitation covenants | 12 months |
Remy W. Trafelet |  |
Related Party Transaction [Line Items] |  |
Annual base salary |  | $ 400
Payment to executives in cash |  | 400
Options granted in period (in shares) | 300,000 |
Period equivalent to severance cost payment | 24 months |
Henry R. Slack |  |
Related Party Transaction [Line Items] |  |
Annual base salary |  | 250
Payment to executives in cash |  | 250
Options granted in period (in shares) | 225,000 |
George R. Brokaw |  |
Related Party Transaction [Line Items] |  |
Annual base salary |  | 250
Payment to executives in cash |  | $ 250
Options granted in period (in shares) | 225,000 |
Period equivalent to severance cost payment | 18 months |
Tranche One |  |
Related Party Transaction [Line Items] |  |
Percentage of options | 25.00% |
Amount per share (in dollars per share) | $ 60.00 |
Tranche Two |  |
Related Party Transaction [Line Items] |  |
Percentage of options | 25.00% |
Amount per share (in dollars per share) | $ 75.00 |
Tranche Three |  |
Related Party Transaction [Line Items] |  |
Percentage of options | 25.00% |
Amount per share (in dollars per share) | $ 90.00 |
Tranche Four |  |
Related Party Transaction [Line Items] |  |
Percentage of options | 25.00% |
Amount per share (in dollars per share) | $ 105.00 |

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