Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Current period change in other comprehensive loss before reclassifications	$ (32)	$ 18	$ (67)	$ (21)
Reclassification to net loss for realized losses	42	$ 0	76	$ 60
Unrealized Loss in Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(61)
Balance, end of period	$ (52)		$ (52)