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

Expenses - Additional Information (Details)

v3.22.1
Expenses - Additional Information (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Selling and marketing expenses € 20,448 € 20,044 € 26,144
Increase (decrease) in selling and marketing expenses 404 (6,100)  
Research and development expenses 29,616 17,390 7,826
Increase in research and development expenses 12,226 9,564  
General and administrative expenses 62,502 58,863 50,568
Depreciation and amortization 56,383 54,103 46,217
Increase in general and administrative expenses 3,639 8,295  
Non-recurring out of cycle bonus to personnel amount 6,526    
Costs related to listing of shares 794    
Selling and Marketing Expenses      
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Accrual of provision for bad debt.   1,084 3,859
Accrual of provision for expected credit loss   1,079 3,656
Release of provision for bad debt 933    
Release of provision for expected credit loss 936    
Receivables write-off 3 5 203
Depreciation and amortization 787 844 702
Research and Development Expenses      
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Depreciation and amortization 3,353 2,580 930
General and Administrative Expenses      
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Depreciation and amortization 5,985 5,383 6,088
Amortization of fair value adjustments from purchase price allocations 1,039 1,039 € 1,039
Non-recurring litigation costs arising from lawsuit   € 2,821  
General and Administrative Expenses | Incentive Plan 2012-2021, Incentive Plan 2018-2022 and Partially to New Stock Grant Plan 2021-2027      
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Non-recurring accrual reversal amount 9,884    
General and Administrative Expenses | Incentive Plan 2018-2022, Incentive Plan 2012-2021 and Partially to New Stock Grant Plan 2021-2027      
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Non-recurring accrual reversal amount 9,884    
Cash Settled Awards      
Disclosure Of Attribution Of Expenses By Nature To Their Function [Line Items]      
Non-recurring accrual reversal amount € 9,884