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Inventories (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Inventories [Abstract]
Raw materials	$ 19,688,000	$ 18,990,000
Work in process	16,948,000	16,222,000
Finished goods	2,839,000	3,362,000
Inventories, total	39,475,000us-gaap_InventoryNet	38,574,000us-gaap_InventoryNet
Inventory reserve	$ 11,400,000us-gaap_InventoryValuationReserves	$ 11,200,000us-gaap_InventoryValuationReserves

Amount of valuation reserve for inventory.

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- Definition

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, 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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