CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (26,728)	$ (8,319)	$ (56,858)	$ (21,593)
Other comprehensive loss:
Net unrealized loss on investments in available- for-sale securities, net of tax	(389)	(1,014)	(2,611)	(1,320)
Comprehensive loss	$ (27,117)	$ (9,333)	$ (59,469)	$ (22,913)