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Balance Sheet Information (Details 2) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Restricted Cash
Restricted cash	$ 518,000	$ 518,000	$ 2,738,000
Accounts Receivable, Net
Allowance for doubtful accounts receivable (in dollars)	800,000	800,000	2,400,000
Collection relating to previously reserved accounts	1,900,000	1,900,000
Inventories
Materials	29,034,000	29,034,000	34,301,000
Work in process	12,736,000	12,736,000	12,900,000
Finished goods	6,594,000	6,594,000	12,525,000
Inventories	48,364,000	48,364,000	59,726,000
Collateral for Bank Guarantees
Restricted Cash
Restricted cash	$ 500,000	$ 500,000	$ 2,700,000

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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