Share Based Compensation (Tables)

3 Months Ended

Apr. 30, 2018

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, 2018		April 30, 2017
Cost of sales	$	80	$	58
Research and development expenses	31		37
Selling, general, and administrative expenses	676		696
Total stock-based compensation expense	$	787	$	791