Balance Sheet Components - Additional Information (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Property Plant And Equipment [Line Items] | ||||
| Loss on disposal of property and equipment | $ 97,000 | |||
| Leasehold Improvements | ||||
| Property Plant And Equipment [Line Items] | ||||
| Incentive received from landlord to construct leasehold improvements | 3,200,000 | |||
| Leasehold Improvements, Laboratory Equipment and Office Equipment | ||||
| Property Plant And Equipment [Line Items] | ||||
| Loss on disposal of property and equipment | $ 0 | $ 0 | $ 97,000 | $ 0 |
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Net cash outflow or inflow from monetary allowance granted by the landlord to a tenant to entice tenant to move into landlords building which will enable the tenant to prepare the leased premises for tenants occupancy. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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