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Income Taxes (Tables)
 9 Months Ended
Oct. 31, 2016
Income Tax Disclosure [Abstract]  
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (amounts in thousands):

Unrecognized tax benefits, January 31, 2016  $987 
Changes for prior years’ tax positions   749 
Changes for current year tax positions   491 
Unrecognized tax benefits, October 31, 2016  $2,227