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Income Tax Effective tax rate (Tables)
3 Months Ended
Apr. 30, 2020
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] The Company’s effective tax rates were as follows:
Three Months Ended
April 30,
2020
April 30,
2019
Effective tax rate(13.8)%12.2 %
Discrete Tax Benefit (Expense) [Table Text Block]
Three Months Ended
April 30,
2020
April 30,
2019
Discrete tax benefit$331  $1,168