Inventories (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Classification of inventories [Abstract]
Raw materials, net	$ 2,374,000	$ 2,468,000
Work in process, net	1,696,000	1,604,000
Finished goods, net	1,390,000	1,277,000
Total Inventories, net	5,460,000	5,349,000
Inventory Reserve for Obsolescence	$ 2,412,000	$ 2,318,000