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Stockholders' Equity (Deficit) - PSU Awards (Detail) |  | 12 Months Ended
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May 18, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Three-year PSU Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance period |  | 3 years |
Three-year PSU Awards | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares to be issued as percentage of target shares under performance incentive plan |  | 0.00% |
Three-year PSU Awards | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares to be issued as percentage of target shares under performance incentive plan |  | 200.00% |
2016 Three-year PSU Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance period | 3 years |  |
Weighted average return on total shareholders |  | 50.00% |
Target level for the determination of performance goals and measures for adjusted EBITDA goal |  | 50.00% |
2017 Three-year PSU Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance period | 3 years |  |
Weighted average return on total shareholders |  |  | 34.00%
Target level for the determination of performance goals and measures for adjusted EBITDA goal |  |  | 33.00%
Compound annual growth rate of net trade sales |  |  | 33.00%
2018 Three-year PSU Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted average return on total shareholders |  | 34.00% |
Target level for the determination of performance goals and measures for adjusted EBITDA goal |  | 50.00% |
Compound annual growth rate of net trade sales |  | 33.00% |
PSUs – Total Shareholder Return |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance period |  | 3 years |

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