XML 98 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property, Plant, and Equipment - Summary of Property, Plant, and Equipment (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance € 12,482 € 5,581 € 2,225
Increase in property, plant, and equipment 5,443 6,901 3,375
Decrease in property, plant, and equipment (118)   18
Property, plant, and equipment ending balance 17,808 12,482 5,581
Total, gross [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 15,685 7,646 3,775
Increase in property, plant, and equipment 7,114 8,039 4,365
Decrease in property, plant, and equipment (329)   (493)
Property, plant, and equipment ending balance 22,470 15,685 7,646
Total, gross [member] | Laboratory equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 3,097 2,357 2,257
Increase in property, plant, and equipment 2,806 740 467
Decrease in property, plant, and equipment (83)   (368)
Property, plant, and equipment ending balance 5,820 3,097 2,357
Total, gross [member] | Building fixtures [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 4,610 938 930
Increase in property, plant, and equipment 534 3,672 8
Decrease in property, plant, and equipment (46)    
Property, plant, and equipment ending balance 5,098 4,610 938
Total, gross [member] | Office equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 607 209 215
Increase in property, plant, and equipment 275 398 24
Decrease in property, plant, and equipment (116)   (30)
Property, plant, and equipment ending balance 766 607 209
Total, gross [member] | Computer equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 986 470 322
Increase in property, plant, and equipment 116 516 244
Decrease in property, plant, and equipment (30)   (95)
Property, plant, and equipment ending balance 1,073 986 470
Total, gross [member] | Property, plant, and equipment in progress [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 6,385 3,672 51
Increase in property, plant, and equipment 3,384 2,713 3,622
Decrease in property, plant, and equipment (55)    
Property, plant, and equipment ending balance 9,714 6,385 3,672
Total accumulated amortization and depreciation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 3,202 2,065 1,550
Increase in property, plant, and equipment 1,671 1,137 990
Decrease in property, plant, and equipment (211)   (475)
Property, plant, and equipment ending balance 4,663 3,202 2,065
Total accumulated amortization and depreciation [member] | Scenario, Previously Reported [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 3,203    
Property, plant, and equipment ending balance   3,203  
Total accumulated amortization and depreciation [member] | Laboratory equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 1,505 948 916
Increase in property, plant, and equipment 802 557 382
Decrease in property, plant, and equipment (63)   (349)
Property, plant, and equipment ending balance 2,244 1,505 948
Total accumulated amortization and depreciation [member] | Building fixtures [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 1,109 782 286
Increase in property, plant, and equipment 484 327 496
Decrease in property, plant, and equipment (14)    
Property, plant, and equipment ending balance 1,580 1,109 782
Total accumulated amortization and depreciation [member] | Office equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 212 131 126
Increase in property, plant, and equipment 213 81 35
Decrease in property, plant, and equipment (105)   (30)
Property, plant, and equipment ending balance 320 212 131
Total accumulated amortization and depreciation [member] | Computer equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant, and equipment beginning balance 377 205 222
Increase in property, plant, and equipment 172 172 78
Decrease in property, plant, and equipment (30)   (95)
Property, plant, and equipment ending balance € 520 € 377 € 205