CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (12,951)	$ (5,696)
Other comprehensive loss:
Net unrealized loss on investments in available- for-sale securities, net of tax	(1,302)	(198)
Comprehensive loss	$ (14,253)	$ (5,894)