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The Company - Additional Information (Detail) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 21, 2016 Director | Sep. 30, 2016 Patient | Dec. 31, 2017
Disclosure Of Company [Line items] |  |  |
Number of directors after additions | Director | 8 |  |
Viaskin Peanut [member] | Bottom of range [member] |  |  |
Disclosure Of Company [Line items] |  |  |
Age of patients evaluated |  |  | 4 years
Viaskin Peanut [member] | Top of range [member] |  |  |
Disclosure Of Company [Line items] |  |  |
Age of patients evaluated |  |  | 11 years
Viaskin Milk [member] |  |  |
Disclosure Of Company [Line items] |  |  |
Number of patients evaluated | Patient |  | 198 |
Viaskin Milk [member] | Bottom of range [member] |  |  |
Disclosure Of Company [Line items] |  |  |
Age of patients evaluated |  | 2 years |
Viaskin Milk [member] | Top of range [member] |  |  |
Disclosure Of Company [Line items] |  |  |
Age of patients evaluated |  | 17 years |

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- Details
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