Selected Balance Sheet Data - Summary of Deferred Rent and Other Liabilities (Parenthetical) (Detail) |
Dec. 31, 2018
USD ($)
|
|---|---|
| Accounts Payable and Accrued Liabilities [Member] | |
| Deferred Rent and other liabilities [Line Items] | |
| Contingent consideration, current | $ 821,000 |
| X | ||||||||||
- Definition Deferred Rent and other liabilities [Line Items] No definition available.
|
| X | ||||||||||
- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|