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Share Based Compensation
 9 Months Ended
Oct. 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 EndedNine Months Ended
October 31, 2020October 31, 2019October 31, 2020October 31, 2019
Cost of sales$64 $98 $182 $273 
Research and development expenses369 41 1,126 122 
Selling, general, and administrative expenses936 852 3,670 3,144 
Total share-based compensation expense$1,369 $991 $4,978 $3,539