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Balance Sheet Account Detail Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 4,080	$ 3,793
Work-in-process	7,082	4,539
Finished goods	12,874	11,226
Inventories	$ 24,036	$ 19,558

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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