CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (98,720)	$ (31,091)	$ (7,314)
Other comprehensive (loss) income:
Net unrealized (loss) gain on investments in available-for-sale securities, before tax	(2,520)	2,094	679
Income tax			(176)
Comprehensive loss	$ (101,240)	$ (28,997)	$ (6,811)