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Convertible Notes (Details) - 4% Convertible Senior Notes due 2022 [Member]
6 Months Ended
Mar. 03, 2017
USD ($)
Notes
Dec. 23, 2018
Subsidiary
$ / shares
Convertible Notes [Abstract]    
Shareholders exercised subscription rights | Notes 30,000  
Par value of shares exercised per note $ 100  
Proceeds from issuance of convertible notes $ 3,000,000  
Interest on convertible notes 4.00% 4.00%
Maturity date of notes   Feb. 15, 2022
Number of direct operating subsidiaries | Subsidiary   2
Conversion rate of common stock (in dollars per share) | $ / shares   $ 2.00