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Share Capital - Additional Information (Detail)
3 Months Ended
Jun. 30, 2018
kr / shares
shares
Feb. 26, 2018
shares
Jun. 30, 2018
kr / shares
shares
Feb. 25, 2018
shares
Disclosure of classes of share capital [line items]        
Number of shares issued 41,841,590   41,841,590  
Share nominal value | kr / shares kr 1   kr 1  
Number of shares issued public offering   4,539,473    
Number of shares outstanding 41,841,590 41,523,765 41,841,590 36,984,292
Warrants [member]        
Disclosure of classes of share capital [line items]        
Share nominal value | kr / shares kr 1   kr 1  
Aggregate number of warrants exercised 1,918,670   317,825