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Income Taxes (Tables)
 3 Months Ended
Apr. 30, 2021
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,		 
   2021   2020 
         
Unrecognized tax benefits, beginning of period  $8,400   $7,370 
Changes for prior years’ tax positions   5    1 
Changes for current year tax positions   138    - 
Unrecognized tax benefits, end of period  $8,543   $7,371