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Post-Retirement Benefit Plans (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Post Retirement Benefit Plans [Line Items]    
Retirement indemnity benefit obligation, beginning of year $ 2,350 $ 2,142
Service cost 117 99
Interest cost 20 36
Plan amendments 0 0
Benefits paids (46) (87)
Actuarial loss (gain) (27) 460
Exchange rate changes (244) (300)
Retirement indemnity benefit obligation, end of year $ 2,170 $ 2,350