XML 43 R32.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Others (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2020
Aug. 31, 2020
Restricted Cash and Cash Equivalents    
Restricted Cash Equivalents, Current $ 87 $ 85
Restricted Cash, Noncurrent $ 97 $ 95
Revenues Recognition    
Minimum warranty period 3 months  
Maximum warranty period 2 years