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Events After the Date of the Statement of Financial Position - Additional Information (Detail) - Nonadjusting Events [Member] - Adexus S.A. [member]
Jan. 09, 2020
Disclosure of non-adjusting events after reporting period [line items]  
Percentage of favorable vote for reorganization by pledge creditors 80.00%
Percentage of favorable vote for reorganization by unsecured creditors 85.00%
Time period to repay reorganized liabilities 6 years