Property and Equipment - Additional Information (Detail) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Property, Plant and Equipment [Abstract] | ||
| Fully depreciated computer software and hardware and furniture, fixtures and equipment write-off | $ 784,000 | $ 949,000 |
| X | ||||||||||
- Definition Fully depreciated computer software hardware and furniture fixtures and equipment writeoff. No definition available.
|
| X | ||||||||||
- References No definition available.
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