Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 67,453		$ 67,453		$ 71,810
Less accumulated depreciation and amortization	(32,617)		(32,617)		(33,176)
Property and equipment, net	34,836		34,836		38,634
Cash proceeds from dispose of racks and machinery			572	2
Loss on disposals of property and equipment	(58)	(61)	(1,081)	(137)
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	90		90		87
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,935		6,935		8,347
Vending Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	26,418		26,418		24,083
Racks and Display Panels [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	28,621		28,621		33,562
Cash proceeds from dispose of racks and machinery			1,212
Gross accumulated depreciation and amortization	5,392		5,392
Accumulated depreciation on property and equipment	(3,677)		(3,677)
Loss on disposals of property and equipment	(503)		(503)
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	234		234		234
Software and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,088		4,088		3,972
Vehicles Under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	405		405		0
Equipment Not in Service [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 662		$ 662		$ 1,525