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Income Taxes (Details 4) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Schedule of reconciliation of beginning and ending amounts of gross unrecognized tax benefits      
Beginning balance $ 2,481 $ 2,657 $ 2,740
Additions for tax positions taken in the current year 142 175 128
Lapse of statute of limitations   (311) (34)
Non U.S. currency exchange fluctuations (4) (40) (177)
Ending balance $ 2,619 $ 2,481 $ 2,657