Quarterly report pursuant to Section 13 or 15(d)

Leases - Narrative (Details)

v3.21.1
Leases - Narrative (Details)
$ in Millions
 1 Months Ended 3 Months Ended
May 31, 2020
ft²
Feb. 29, 2020
USD ($)
ft²
Aug. 31, 2015
ft²
Mar. 31, 2021
USD ($)
ft²
extensionOption
Mar. 31, 2020
USD ($)
ft²
floor
leaseAgreement
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Loss Contingencies [Line Items]              
Lease liabilities | $       $ 0.7 $ 0.3    
Boston, Massachusetts              
Loss Contingencies [Line Items]              
Area of leased property (square feet)     3,950        
Freising, Germany              
Loss Contingencies [Line Items]              
Area of leased property (square feet)         19,000    
Number of lease agreements (in lease agreements) | leaseAgreement         4    
Hallbergmoos, Germany              
Loss Contingencies [Line Items]              
Area of leased property (square feet)   105,000          
Lease term   12 years 6 months          
Number of agreement extension options (in extension options) | extensionOption       2      
Lease renewal term       60 months      
Rent expense | $   $ 0.2          
Security deposit | $             $ 0.8
Tenant improvements | $           $ 11.5  
Leases in same building | Freising, Germany              
Loss Contingencies [Line Items]              
Number of lease agreements (in lease agreements) | leaseAgreement         3    
Number of floors (in floors) | floor         3    
Leases expected to be delivered by February 2020 | Hallbergmoos, Germany              
Loss Contingencies [Line Items]              
Area of leased property (square feet)   98,400          
Leases expected to be delivered by May 2020 | Hallbergmoos, Germany              
Loss Contingencies [Line Items]              
Area of leased property (square feet) 5,100            
Leases expected to be delivered by October 2024 | Hallbergmoos, Germany              
Loss Contingencies [Line Items]              
Area of leased property (square feet)       22,300      
Leases with first right of refusal for additional area | Hallbergmoos, Germany              
Loss Contingencies [Line Items]              
Area of leased property (square feet)       13,400