Income Tax Effective tax rate (Tables)

9 Months Ended

Oct. 31, 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				Nine Months Ended
	October 31, 2020		October 31, 2019		October 31, 2020		October 31, 2019
Effective tax rate	1.6	%	13.0	%	1.9	%	14.7	%

Discrete Tax Benefit (Expense) [Table Text Block]

	Three Months Ended				Nine Months Ended
	October 31, 2020		October 31, 2019		October 31, 2020		October 31, 2019
Discrete tax benefit	$	303	$	268	$	580	$	1,336