Revenue Recognition - Summary of Impact of Adopting the New Revenue Standard on Condensed Consolidated Balance Sheet (Parenthetical) (Detail) - $ / shares	Dec. 31, 2018	Jun. 30, 2018
Revenue from Contract with Customers [Line Items]
Preferred Stock, $.001 par value	$ 0.001	$ 0.001
Common Stock, $.001 par value	0.001	$ 0.001
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue from Contract with Customers [Line Items]
Preferred Stock, $.001 par value	0.001
Common Stock, $.001 par value	0.001
Accounting Standards Update 2014-09 [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue from Contract with Customers [Line Items]
Preferred Stock, $.001 par value	0.001
Common Stock, $.001 par value	$ 0.001