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Discontinued Operations Cashflows from discontinued operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Cashflows from discontinued operations [Abstract]    
Net cash(used in) provided by discontinued operating activities $ (37) $ 1,133
Net cash provided by discontinued investing activities 0 9,606
Net cash used in discontinued financing activities $ 0 $ (10,739)