Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2016 |
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| Property Plant And Equipment [Abstract] | ||
| Asset impairment charge | $ 202 | $ 202 |
| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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