Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Inventory
Raw materials	$ 26,198	$ 18,181
Finished goods	31,276	24,492
Allowance for obsolescence	(21,278)	(20,755)
Total inventory, net	$ 36,196	$ 21,918

The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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+ Details