Commitments and Contingencies - Additional Information Other (Detail) - USD ($) |
Mar. 31, 2019 |
Dec. 31, 2018 |
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| Commitments and Contingencies Disclosure [Abstract] | ||
| Other commitment amount | $ 510,000.0 | $ 1,000,000 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. No definition available.
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