Equity Investment - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Nov. 30, 2019	Nov. 25, 2019	Nov. 30, 2019
Schedule Of Equity Method Investments [Line Items]
Equity investment	$ 5,485		$ 5,485
MediaCo Holding Inc | Contribution Agreement
Schedule Of Equity Method Investments [Line Items]
Percentage of equity ownership interest	23.72%		23.72%
Percentage of outstanding voting interest	3.05%
Equity investment	$ 5,500		$ 5,500
MediaCo Holding Inc | Contribution Agreement | Common Stock
Schedule Of Equity Method Investments [Line Items]
Cash acquired in exchange of assets		$ 91,500
Note acquired in exchange of assets		$ 5,000
MediaCo Holding Inc | Contribution Agreement | Class A Common Stock
Schedule Of Equity Method Investments [Line Items]
Shares acquired in return of assets		1,666,667
Percentage of equity ownership interest		23.72%
Percentage of outstanding voting interest		3.02%
Common stock taxable pro rate distribution of per share		$ 0.1265
Fair value of common stock price per share	$ 3.29		$ 3.29