Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Amount
Tax at Federal statutory rate	$ 3,639	$ 2,269	$ 2,822
Meals and entertainment	29	44	49
State income taxes, net of Federal income tax benefit	146	112	103
Foreign source income not subject to tax	(1,617)	(1,213)	(1,219)
R&D Credit	(523)	(523)	(408)
Foreign withholding tax	205
Release of accrued tax reserves			(151)
U.S. Federal Tax rate reduction	312	775
IRS examination settlements		832	12
Other, net	238	(12)	14
Provision for income taxes	$ 2,429	$ 2,284	$ 1,222
% of Pre-tax Income
Tax at Federal statutory rate	21.00%	21.00%	21.00%
Meals and entertainment	0.20%	0.40%	0.30%
State income taxes, net of Federal income tax benefit	0.80%	1.00%	0.80%
Foreign source income not subject to tax	(9.30%)	(11.20%)	(9.10%)
R&D Credit	(3.00%)	(4.80%)	(3.00%)
Foreign withholding tax	1.00%		0.00%
Release of accrued tax reserves			(1.10%)
Uncertain Tax Positions	1.80%	7.00%	0.00%
IRS examination settlements		7.70%	0.10%
Other, net	1.30%	(0.10%)	0.10%
Effective tax rate	14.00%	21.10%	9.10%