Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,427	$ 7,415
Less: accumulated depreciation and amortization	5,656	4,361
Property, plant and equipment, net	2,771	3,054
State and local - current	12	23	$ 19
Income tax expense	19	23	$ 19
Building and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,386	1,386
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,040	3,586
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,001	$ 2,443