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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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