Income Taxes (Narrative) (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Income Taxes [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 0		$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%		35.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount					$ 381,000
Unrecognized Tax Benefits, Period Increase (Decrease)			$ 35,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	256,000		256,000
Income Tax Expense (Benefit)	419,000	$ (89,000)	667,000	$ 54,000
Deferred Tax Liabilities, Tax Deferred Income	$ 1,800,000		$ 1,800,000