Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 82,352	$ 83,102
Less accumulated depreciation	(45,766)	(43,202)	$ (41,486)
Property and equipment, net	36,586	39,900
Depreciation	7,608	7,193	$ 6,127
Hardware Revenue Generating Asset [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, net	7,734	10,201
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,828	3,828
Building and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	21,717	22,407
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	155	299
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	41,777	40,788
Office and computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,824	15,729
Motor vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 51	$ 51