Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Income Tax - Summary of Timing of Tax Losses Carryforwards (Details)

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Income Tax - Summary of Timing of Tax Losses Carryforwards (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses € 3,800 € 8,794
2022    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses 16 15
2023    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses 320 306
2024    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses 351 336
2025    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses 315 304
2026    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses 318 262
2027    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses 274 283
Unlimited    
Timing of unrecognized tax losses carryforward    
Unrecognized tax losses € 2,206 € 7,288