Annual report pursuant to Section 13 and 15(d)

Employee benefit plan (Details) - Schedule of substantially funded

v3.7.0.1
Employee benefit plan (Details) - Schedule of substantially funded - USD ($)
$ in Thousands
Jul. 31, 2017
Dec. 31, 2016
Jul. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Schedule of substantially funded [Abstract]          
Total Assets $ 107,665 $ 2,184 $ 111,821 $ 2,149 $ 2,132
Accumulated Benefit Obligation   $ 2,432   $ 2,397 $ 2,421
Funded status   90.00%   90.00% 88.00%