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Financial risk management (Details)
$ / shares in Units, € in Thousands, £ in Millions, $ in Millions
12 Months Ended
Dec. 22, 2017
EUR (€)
Dec. 31, 2019
GBP (£)
$ / shares
Dec. 31, 2019
EUR (€)
Dec. 31, 2018
EUR (€)
Dec. 31, 2017
EUR (€)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Financial risk              
Proceeds from issuance of long-term debt     € 529 € 1,639 € 12,612    
increase/decrease of the price per ADR | $ / shares   $ 1.00          
Increase/decrease of the derivative financials instrument     € 1,100        
Interest rate risk              
Financial risk              
Change in interest rate( as a percent)     10.00        
Impact of change in interest rate     € 2        
Eurozone | Foreign exchange risk              
Financial risk              
Percentage of revenue generated     30.60%        
Revenue invoiced (as a percent)     62.00% 70.00% 70.00%    
voxeljet UK              
Financial risk              
Amount borrowed by affiliate   $ 7.8         € 9,100
Increase in designated risk component (as a percent)   10.00%       10.00% 10.00%
Loss due to relative change             € 800
voxeljet America              
Financial risk              
Amount borrowed by affiliate           $ 5.6 € 5,000
Increase in designated risk component (as a percent)   10.00%       10.00% 10.00%
Loss due to relative change             € 500
EIB-Tranche one | Interest rate risk              
Financial risk              
Proceeds from issuance of long-term debt € 10,000            
Effective interest rate (as a percent)   7.58%       7.58% 7.58%