Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,076)	$ (5,780)
Other comprehensive (loss) income:
Unrealized loss on available-for-sale debt securities	(69)	24
Comprehensive loss	$ (2,145)	$ (5,756)