Inventories (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Classification of inventories [Abstract]
Raw materials	$ 1,387,000	$ 1,418,000
Work in process	1,391,000	1,325,000
Finished goods	919,000	803,000
Total Inventories, net	3,697,000	3,546,000
Inventory reserve for obsolescence	$ 2,873,000	$ 3,016,000