Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Current period change in other comprehensive loss before reclassifications	$ (36)	$ (80)	$ (35)	$ (39)
Reclassification to net loss for realized losses	33	$ 60	34	$ 60
Unrealized Loss in Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(61)
Balance, end of period	$ (62)		$ (62)