Income Taxes (Primary Components Of Deferred Tax Assets And (Liabilities)) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	$ 1,740	$ 3,660
Accounts Receivable [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	460	490
Inventory [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	(50)	500
Self Insurance [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	560	660
Payroll and Related [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	1,690	3,120
Accrued Liabilities [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	1,240	1,100
Property, Plant and Equipment [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	(2,850)	(3,080)
Investment Tax Credit [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	1,930	1,990
Valuation Allowance [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	(1,390)	(1,380)
Other [Member]
Components Of Deferred Tax Assets And Liabilities [Line Items]
Long-term	$ 150	$ 260