In-Process Research and Development - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Dec. 31, 2018 |
|
| Research And Development [Abstract] | ||||
| Impairment of in-process research and development | $ 22,100 | $ 22,139 | $ 0 | |
| In-process research and development - held for sale | $ 4,500 | $ 4,500 | $ 26,623 | |
| X | ||||||||||
- Definition In process research and development held for sale current. No definition available.
|
| X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|