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Schedule of (Loss) Per Share, Basic and Diluted (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net loss - basic	$ (11,454)	$ (20,217)	$ (13,546)	$ (23,211)
Change in fair value of warrant liability	(7,083)		(20,307)
Net loss - diluted	$ (18,537)	$ (20,217)	$ (33,853)	$ (23,211)

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