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Stock-based Compensation (Tables)
 3 Months Ended
Nov. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of the stock-based compensation expense

A summary of the stock-based compensation expense for the three months ended November 30, 2020 and 2019 was as follows (in thousands):

 

 

 

Three Months Ended November 30,

 

 

 

2020

 

 

2019

 

Cost of revenues

 

$

5

 

 

$

11

 

Research and development

 

 

4

 

 

 

6

 

Selling, general and administrative

 

 

12

 

 

 

18

 

 

 

$

21

 

 

$

35