Share Based Compensation (Tables)

6 Months Ended

Jul. 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				Six Months Ended
	July 31, 2018		July 31, 2017		July 31, 2018		July 31, 2017
Cost of sales	$	103	$	55	$	183	$	113
Research and development expenses	36		31		67		68
Selling, general, and administrative expenses	1,355		1,055		2,031		1,751
Total stock-based compensation expense	$	1,494	$	1,141	$	2,281	$	1,932