Share Based Compensation (Tables)

3 Months Ended

Apr. 30, 2019

Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

The share-based compensation expense was as follows:

	Three Months Ended
	April 30, 2019		April 30, 2018
Cost of sales	$	76	$	80
Research and development expenses	35		31
Selling, general, and administrative expenses	671		676
Total stock-based compensation expense	$	782	$	787