Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrant liability	$ (14,309)	$ (22,355)
Level 3 | Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrant liability	(14,309)	(22,355)	$ (20,176)	$ (40,483)
Total liability	$ (14,309)	$ (22,355)