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Balance Sheet Information (Details 2) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Restricted Cash |  |
Restricted cash | $ 487,000 | $ 2,738,000
Accounts Receivable, Net |  |
Allowance for doubtful accounts receivable (in dollars) | 900,000 | 2,400,000
Collection relating to previously reserved accounts | 1,900,000 |
Inventories |  |
Materials | 26,305,000 | 34,301,000
Work in process | 15,169,000 | 12,900,000
Finished goods | 5,120,000 | 12,525,000
Inventories | 46,594,000 | 59,726,000
Collateral for Bank Guarantees |  |
Restricted Cash |  |
Restricted cash | $ 500,000 | $ 2,700,000

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