XML 67 R43.htm IDEA: XBRL DOCUMENT v3.19.3
Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2019
USD ($)
ft²
Sep. 17, 2018
USD ($)
ft²
Jul. 31, 2019
USD ($)
ft²
Feb. 28, 2019
USD ($)
Feb. 28, 2018
USD ($)
Nov. 30, 2009
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Loss Contingencies [Line Items]                  
Tenant improvement allowance                 $ 6,639,000
Sublease income               $ 891,000 891,000
Cash paid for amounts included in the measurement of operating lease liabilities                 $ 3,800,000
Operating lease, weighted average remaining lease term               9 years 9 months 18 days 9 years 9 months 18 days
Operating lease, weighted average discount rate               10.10% 10.10%
Maximum borrowing capacity         $ 175,000,000.0        
Principal amount including interest paid in kind         $ 179,100,000     $ 179,100,000 $ 179,100,000
Debt maturity date         Dec. 31, 2023       Dec. 31, 2023
Non-cancelable purchase and other commitments               $ 13,000,000.0 $ 13,000,000.0
Symphony Dynamo Holdings LLC                  
Loss Contingencies [Line Items]                  
License arrangement contingent consideration percentage           50.00%      
License arrangement upfront payment           $ 50,000,000      
Milestone payments                 $ 0
Sublicense Agreement | Merck, Sharp & Dohme Corp.                  
Loss Contingencies [Line Items]                  
Payment upon obligation       $ 7,000,000.0 $ 7,000,000.0        
Scenario, Forecast | Sublicense Agreement | Merck, Sharp & Dohme Corp.                  
Loss Contingencies [Line Items]                  
Payment upon obligation             $ 7,000,000.0    
Powell Street Sublease | Emeryville, California (Premises)                  
Loss Contingencies [Line Items]                  
Lease area | ft² 23,976   23,976            
Base rent per square feet $ 3.90                
Lease expiration date Jun. 30, 2022                
Option to extend                 There is no option to extend the sublease term
Existence of option to extend                 false
Horton Street Master Lease                  
Loss Contingencies [Line Items]                  
Percentage of excess rent paid to landlord               50.00% 50.00%
Horton Street Master Lease | Emeryville, California (Premises)                  
Loss Contingencies [Line Items]                  
Lease area | ft²   75,662              
Base rent per square feet   $ 4.75              
Operations commencement date   Apr. 01, 2019              
Initial lease term   12 years              
Lease option to extend   The Horton Street Master Lease has an initial term of 12 years, following the Commencement Date with an option to extend the lease for two successive five-year terms.              
Renewal term of lease   5 years              
Horton Street Master Lease | Emeryville, California (Premises) | Maximum                  
Loss Contingencies [Line Items]                  
Tenant improvement allowance   $ 8,300,000              
Horton Street Sublease | Emeryville, California (Premises)                  
Loss Contingencies [Line Items]                  
Lease area | ft² 75,662   75,662            
Base rent per square feet     $ 5.50            
Lease expiration date     Mar. 31, 2031            
Option to extend     The Subtenant has no option to extend the sublease term.            
Existence of option to extend     false            
Sublease income                 $ 900,000
Horton Street Sublease | Emeryville, California (Premises) | Other Income (Expense)                  
Loss Contingencies [Line Items]                  
Sublease income               $ 900,000