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Subsequent Event - Additional Information (Detail) - Revolving Credit Facility [Member] - USD ($)
$ in Millions
Dec. 09, 2019
Nov. 02, 2019
Third Amendment [Member]    
Subsequent Event [Line Items]    
Maximum borrowing capacity   $ 10.0
Subsequent Event [Member] | Fourth Amendment [Member]    
Subsequent Event [Line Items]    
Maximum borrowing capacity $ 17.5