Interest and Other Income (Schedule of Interest and other income) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Other Income And Expenses [Abstract]
Dividends	$ 222	$ 233	$ 257
Interest	313	282	237
Foreign government subsidies received	25	22	38
Joint venture equity earnings	2,060	1,761	2,024
Foreign currency gains (losses)	56	(1,065)	(102)
Rental income	154	151	144
Miscellaneous (expense) income	(7)	102	(96)
Interest and other income	$ 2,823	$ 1,486	$ 2,502