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BALANCE SHEET DETAILS - Components of Inventories (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]
Inventory Write-down	$ 700,000
Net benefits from inventory reserve		500,000
Purchased parts and raw materials	20,215,000		20,820,000
Work-in-process	5,365,000		3,186,000
Finished goods	8,411,000		9,303,000
Inventories, net	$ 33,991,000		$ 33,309,000

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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- Definition

Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

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