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Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Current:      
Federal $ 1,269 $ 1,930 $ 1,666
State 209 470 466
Foreign 725 276 535
Current Income Tax Expense 2,203 2,676 2,667
Deferred:      
Federal 150 (402) (290)
State 37 126 (107)
Foreign (13) (16)  
Deferred Income Tax Expense Total 174 (292) (397)
Total $ 2,377 $ 2,384 $ 2,270