Annual report pursuant to Section 13 and 15(d)

Employee benefit plan (Details) - Schedule of substantially funded

v3.5.0.2
Employee benefit plan (Details) - Schedule of substantially funded - USD ($)
$ in Thousands
Jul. 31, 2016
Dec. 31, 2015
Jul. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule of substantially funded [Abstract]          
Total Assets $ 111,821 $ 2,149 $ 68,394 $ 2,132 $ 2,531
Accumulated Benefit Obligation   $ 2,397   $ 2,421 $ 2,697
Funded status   90.00%   88.00% 94.00%