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Inventories (Quarter) (Detail) - Inventories (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Raw materials	$ 1,654	$ 1,826	$ 3,948
Work-in-progress	481	449	152
Finished goods	739	600	752
Total Inventories	$ 2,874	$ 2,875	$ 4,852

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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