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Share Based Compensation
 3 Months Ended
Apr. 30, 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 Ended
April 30, 2020April 30, 2019
Cost of sales$80  $76  
Research and development expenses374  35  
Selling, general, and administrative expenses1,042  671  
Total share-based compensation expense$1,496  $782