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Income Taxes (Tables)
 6 Months Ended
Jul. 31, 2022
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):
   Six Months Ended
July 31,		 
   2022   2021 
         
Unrecognized tax benefits, beginning of period  $ 16,781   $ 8,400 
Changes for prior years’ tax positions   93    10 
Changes for current year tax positions   —    275 
Unrecognized tax benefits, end of period  $16,874   $8,685