Net Income (Loss) Per Share - Additional Information (Detail) - USD ($)	Jan. 02, 2018	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020
Preferred stock, issuance		0	0	0
Common stock, par value		$ 0.01	$ 0.01	$ 0.01
Allied Acquisition [Member] | Investment Agreement [Member] | Series A Cumulative Convertible Participating Preferred Stock [Member]
Preferred stock, issuance	400,000
Preferred stock, par value	$ 0.01
Preferred stock, liquidation preference value	$ 400,000,000.0
Preferred stock, liquidation purchase price per share	$ 1,000
Preferred stock conversion price per share	$ 41.26
Preferred stock dividend rate	6.00%
Common stock to be issued upon conversion of convertible preferred stock	9,694,619