Income Taxes - Reconciliation of Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income Tax Benefit Expenses [Line Items]
Tax at Federal statutory rate	$ 2,296	$ 2,140
Increases (decreases) in taxes resulting from:
Meals and entertainment	56	68
State income taxes, net of Federal income tax benefit	29	28
Foreign source income not subject to tax	(1,895)	(1,286)
R&D Credit	(314)	(286)
Transition tax	381	0
Foreign withholding tax	256	0
U.S. Federal Tax rate reduction	(136)	0
Other, net	11	32
Effective tax rate	$ 684	$ 696
Tax at Federal statutory rate	27.60%	34.00%
Increases (decreases) in taxes resulting from:
Meals and entertainment	0.60%	1.10%
State income taxes, net of Federal income tax benefit	0.30%	0.40%
Foreign source income not subject to tax	(22.70%)	(20.40%)
R&D Credit refund	(3.80%)	(4.50%)
Transition tax	4.60%	0.00%
Foreign withholding tax	3.10%	0.00%
U.S. Federal Tax rate reduction	(1.60%)	0.00%
Other, net	0.10%	0.50%
Effective tax rate	8.20%	11.10%