Share Based Compensation (Tables)

9 Months Ended

Oct. 31, 2019

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				Nine Months Ended
	October 31, 2019		October 31, 2018		October 31, 2019		October 31, 2018
Cost of sales	$	98	$	99	$	273	$	282
Research and development expenses	41		32		122		99
Selling, general, and administrative expenses	852		696		3,144		2,727
Total stock-based compensation expense	$	991	$	827	$	3,539	$	3,108