Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies New Accounting Pronouncements (Details)

v3.19.3
Summary of Significant Accounting Policies New Accounting Pronouncements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2018
Aug. 31, 2019
Sep. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets   $ 75  
Accounting Standards Update 2014-09 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets     $ 100
Accounting Standards Update 2016-02 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets   200  
Accounting Standards Update 2018-02 [Domain]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets   $ 3,500  
Minimum | Accounting Standards Update 2016-02 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification $ 55,000    
Maximum | Accounting Standards Update 2016-02 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification $ 65,000