New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Dec. 31, 2017 |
|
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Corporate income tax rate percent | 21.00% | 35.00% | |
| ASU 2016-15 | Reclassified from Operating Activities to Financing Activities | June 2017 Amendment of Senior Secured Credit Facility | |||
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Cash paid | $ 246 | ||
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|