Inventories (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Classification of inventories [Abstract]
Raw materials	$ 1,253,000	$ 1,418,000
Work in process	1,372,000	1,325,000
Finished goods	852,000	803,000
Total Inventories	3,477,000	3,546,000
Inventory Reserve for Obsolescence	$ 3,129,000	$ 3,016,000