Equipment and Leasehold Improvements (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements	$ 29,388	$ 27,587
Less accumulated depreciation and amortization	20,055	18,400
Property, Plant and Equipment, Net, Total	9,333	9,187
Equipment [Member]
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements	27,757	26,006
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements	$ 1,631	$ 1,581