Share Based Compensation (Tables)

6 Months Ended

Jul. 31, 2020

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, 2020		July 31, 2019		July 31, 2020		July 31, 2019
Cost of sales	$	38	$	99	$	118	$	175
Research and development expenses	383		46		757		81
Selling, general, and administrative expenses	1,692		1,621		2,734		2,292
Total share-based compensation expense	$	2,113	$	1,766	$	3,609	$	2,548