Share Based Compensation (Tables)

9 Months Ended

Oct. 31, 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				Nine Months Ended
	October 31, 2018		October 31, 2017		October 31, 2018		October 31, 2017
Cost of sales	$	99	$	62	$	282	$	175
Research and development expenses	32		14		99		82
Selling, general, and administrative expenses	696		853		2,727		2,604
Total stock-based compensation expense	$	827	$	929	$	3,108	$	2,861