Income Taxes - Reconciliation of Income Tax Rate (Details) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Income Taxes
Tax at Federal statutory rate		$ 2,822	$ 2,296
Increases (decreases) in taxes resulting from:
Meals and entertainment		49	56
State income taxes, net of Federal income tax benefit		103	29
Foreign source income not subject to tax		(1,219)	(1,895)
R&D Credit		(408)	(314)
Transition tax		0	381
Foreign withholding tax			256
Release of accrued tax reserves		(151)	0
U.S. Federal Tax rate reduction		0	(136)
Audit Settlements		12	0
Other, net		14	11
Effective tax rate		$ 1,222	$ 684
Tax at Federal statutory rate	35.00%	21.00%	27.60%
Increases (decreases) in taxes resulting from:
Meals and entertainment		0.30%	0.60%
State income taxes, net of Federal income tax benefit		0.80%	0.30%
Foreign source income not subject to tax		(9.10%)	(22.70%)
R&D Credit refund		(3.00%)	(3.80%)
Transition tax		0.00%	4.60%
Foreign withholding tax		0.00%	3.10%
Release of accrued tax reserves		(0.011)	0.0
U.S. Federal Tax rate reduction		0.00%	(1.60%)
Audit Settlements		0.001	0.0
Other, net		0.10%	0.10%
Effective tax rate		9.10%	8.20%