Inventories (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Classification of inventories [Abstract]
Raw materials, net	$ 2,887,000	$ 2,864,000
Work in process, net	1,666,000	1,384,000
Finished goods, net	1,355,000	1,428,000
Total Inventories, net	5,908,000	5,676,000
Inventory Reserve for Obsolescence	$ 2,091,000	$ 1,942,000