Property and Equipment (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 42,585,000		$ 42,585,000		$ 40,779,000
Less accumulated depreciation	(29,797,000)		(29,797,000)		(26,323,000)
Property and equipment, net	12,788,000		12,788,000		14,456,000
Accelerated Depreciation included in the depreciation and software amortization expense			800,000	800,000
Depreciation and amortization	1,806,000	1,681,000	4,341,000	3,273,000
Service costs
Property, Plant and Equipment [Line Items]
Depreciation and amortization	1,294,000	1,363,000	3,199,000	2,644,000
Sales and marketing
Property, Plant and Equipment [Line Items]
Depreciation and amortization	17,000	26,000	35,000	53,000
Product development
Property, Plant and Equipment [Line Items]
Depreciation and amortization	43,000	45,000	82,000	92,000
General and administrative
Property, Plant and Equipment [Line Items]
Depreciation and amortization	452,000	247,000	1,025,000	484,000
Computers and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,513,000		19,513,000		19,180,000
Purchased and internally developed software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	20,985,000		20,985,000		19,546,000
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	800,000		800,000		775,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,287,000		$ 1,287,000		$ 1,278,000