Share Based Compensation (Tables)

6 Months Ended

Jul. 31, 2021

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

The share-based compensation expense was as follows:

	Three Months Ended				Six Months Ended
	July 31, 2021		July 31, 2020		July 31, 2021		July 31, 2020
Cost of sales	$	86	$	38	$	162	$	118
Research and development expenses	353		383		626		757
Selling, general, and administrative expenses	2,205		1,692		3,590		2,734
Total share-based compensation expense	$	2,644	$	2,113	$	4,378	$	3,609