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Income Taxes - Additional Information (Details)
kr in Millions
12 Months Ended
Dec. 31, 2021
DKK (kr)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]        
Valuation allowance   $ 9,700,000    
Deferred tax assets, credit carryforwards   66,800,000    
Unrecognized tax benefits   $ 0 $ 0  
Danish Tax Authority        
Operating Loss Carryforwards [Line Items]        
Open tax year 2018 2018    
Danish Tax Authority | Research and Development Expense        
Operating Loss Carryforwards [Line Items]        
Effective income tax rate       101.50%
Refundable tax credit | kr kr 25      
Refundable tax credit receivable   $ 841,000 $ 904,000  
Danish Tax Authority | Research and Development Expense | Maximum        
Operating Loss Carryforwards [Line Items]        
Refundable tax credit | kr kr 25      
Danish Tax Authority | 2020 through 2022 | Research and Development Expense        
Operating Loss Carryforwards [Line Items]        
Effective income tax rate 130.00% 130.00%    
Danish Tax Authority | 2023 through 2025 | Research and Development Expense        
Operating Loss Carryforwards [Line Items]        
Effective income tax rate 108.00% 108.00%    
Danish Tax Authority | Period 2026 | Research and Development Expense        
Operating Loss Carryforwards [Line Items]        
Effective income tax rate 110.00% 110.00%