Inventories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Classification of inventories [Abstract]
Raw materials	$ 2,468	$ 2,864
Work in process	1,604	1,384
Finished goods	1,277	1,428
Total Inventories, net	5,349	5,676
Inventory reserve for obsolescence	$ 2,318,000	$ 1,942,000