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Income Taxes (Tables)
3 Months Ended
Apr. 30, 2020
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):


   Three Months Ended
April 30,
   2020  2019
       
Unrecognized tax benefits, beginning of period  $7,370   $9,232 
Changes for prior years’ tax positions   1    66 
Changes for current year tax positions   -    138 
Unrecognized tax benefits, end of period  $7,371   $9,436