Inventories (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Classification of inventories [Abstract]
Raw materials	$ 1,834,000	$ 2,468,000
Work in process	1,490,000	1,604,000
Finished goods	1,305,000	1,277,000
Total Inventories, net	4,629,000	5,349,000
Inventory reserve for obsolescence	$ 2,586,000	$ 2,318,000