Commitments and Contingencies - Additional Information (Detail) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2018
USD ($)
lease
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
|
| Other Commitments [Line Items] | |||
| Number of leases | lease | 4 | ||
| Expenses incurred for the properties listed | $ 0.5 | $ 0.5 | $ 0.5 |
| Line of credit | |||
| Other Commitments [Line Items] | |||
| Letters of credit, outstanding | $ 2.1 | ||
| X | ||||||||||
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. No definition available.
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| X | ||||||||||
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. No definition available.
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| X | ||||||||||
- Definition Number of separate real estate development properties located on land subject to ground leases. No definition available.
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| 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.
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| X | ||||||||||
- Details
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