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Share Based Compensation
 6 Months Ended
Jul. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Share Based Compensation SHARE-BASED COMPENSATION
Share-based compensation expense is recognized based on the fair value of the share-based awards expected to vest during the period.

The share-based compensation expense was as follows:
Three Months EndedSix Months Ended
July 31, 2020July 31, 2019July 31, 2020July 31, 2019
Cost of sales$38 $99 $118 $175 
Research and development expenses383 46 757 81 
Selling, general, and administrative expenses1,692 1,621 2,734 2,292 
Total share-based compensation expense$2,113 $1,766 $3,609 $2,548