Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 4,581	$ 4,521
Less: Accumulated Depreciation	(3,523)	(3,434)
Total Property, Plant and Equipment, Net	1,058	1,087
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	452	462
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	289	289
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	310	307
Computers and Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	950	946
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,580	$ 2,517