| Component: (Network and Table) | |
|---|---|
| Network | 100540 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) (http://www.adverum.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentNetScheduleOfPropertyAndEquipmentNetDetail) |
| Table | Schedule Of Property Plant And Equipment [Table] |
| Reporting Entity [Axis] | 0001501756 (http://www.sec.gov/CIK) |
| Property, Plant and Equipment [Line Items] | Period [Axis] | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
2016-12-31 | 2015-12-31 | ||||||||||
| Property, Plant and Equipment, Type | Property, Plant and Equipment, Type | ||||||||||
| Computer Equipment and Software [Member] | Laboratory Equipment [Member] | Furniture and Fixtures [Member] | Leasehold Improvements [Member] | Construction in Progress [Member] | Property, Plant and Equipment, Type | Computer Equipment and Software [Member] | Laboratory Equipment [Member] | Furniture and Fixtures [Member] | Leasehold Improvements [Member] | Property, Plant and Equipment, Type | |
Total property and equipment | |||||||||||
Less accumulated depreciation and amortization | ( | ( | |||||||||
Property and equipment, net | 4,169,000 | 3,187,000 | |||||||||