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Share Based Compensation
 3 Months Ended
Apr. 30, 2021
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 Ended
April 30, 2021April 30, 2020
Cost of sales$76 $80 
Research and development expenses273 374 
Selling, general, and administrative expenses1,385 1,042 
Total share-based compensation expense$1,734 $1,496