Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Loss
Net unrealized loss on short-term investments	$ (91)	$ (15)
Cumulative foreign currency translation adjustment	350	1,121
Defined benefit pension obligation	(2,066)	(2,066)
Accumulated other comprehensive loss	$ (1,807)	$ (960)