Inventories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Schedule Of Inventory [Line Items]
Percentage of LIFO Inventory	46.00%	46.00%
Raw materials	$ 13,363	$ 15,633
Work in process	12,578	11,723
Finished goods	2,531	1,609
Subtotal	28,472	28,965
Reserve for LIFO cost valuation	(7,365)	(7,436)
Inventories	$ 21,107	$ 21,529

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Certain changes made in the current period to the value and amount of inventory reported.

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Carrying amount as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

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Carrying amount as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process. Also includes purchased parts that will be used as components of a finished product.

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Carrying amount as of the balance sheet date of merchandise or goods which are partially completed, are generally comprised of raw materials, labor and factory overhead costs, and which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent.

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