Inventories and Deferred Costs of Goods Sold (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Raw materials	$ 1,838	$ 2,284
Work in process	2,302	3,871
Finished goods	1,214	998
Net inventory	5,354	7,153
Deferred cost of goods sold	94	180
Inventory Valuation Reserves	$ 1,100	$ 860