Note Payable-Related Party - Additional Information (Detail) € in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2015
EUR (€)
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2014
EUR (€)
|
|
| Debt Disclosure [Abstract] | ||||
| Principal balance of the note payable | € | € 1,138 | € 1,138 | ||
| Note payable — related party | $ | $ 1,241 | $ 1,389 | ||
| Note payable estimated life | 6 years | |||