Property and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 147,000	$ 222,000	$ 304,000
Property, Plant and Equipment, Disposals	68,000	30,000
Gain (Loss) on Disposition of Property Plant Equipment	$ 3,000	$ 14,000