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Leases - Additional Information (Details)
 1 Months Ended 3 Months Ended
Apr. 30, 2021
USD ($)
Jun. 30, 2020
ft²
Mar. 31, 2021
USD ($)
Facility
Mar. 31, 2020
USD ($)
Leases [Line Items]        
Number of office and laboratory space | Facility     4  
Rent expense     $ 98,000 $ 42,000
Future lease payments     $ 1,066,000  
Denmark        
Leases [Line Items]        
Operating lease, expiration date     Oct. 31, 2021  
Lease renewal option expiration date     Oct. 31, 2024  
Description of lease, option to extend     renewal option which expires in October 2024.  
Operating lease, option to extend     true  
Office space under operating lease | ft²   1,300    
Operating lease description     In April 2021, the Company entered into an operating lease agreement for its corporate headquarters in Copenhagen, Denmark, for office space, which will supersede the Company’s existing lease agreement. The lease agreement expires in January 2025  
Denmark | Subsequent Event        
Leases [Line Items]        
Operating lease, expiration date Jan. 31, 2025      
Lease renewal option expiration date Jan. 31, 2025      
Future lease payments $ 286,000      
United Kingdom        
Leases [Line Items]        
Operating lease, expiration date     Aug. 31, 2022  
Sweden        
Leases [Line Items]        
Operating lease, expiration date     Sep. 30, 2022