Stockholders' Equity (Details) (USD $)	0 Months Ended	12 Months Ended																					0 Months Ended
	Sep. 17, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Cost of revenues [Member]	Dec. 31, 2012 Cost of revenues [Member]	Dec. 31, 2013 Sales and marketing [Member]	Dec. 31, 2012 Sales and marketing [Member]	Dec. 31, 2013 Technology support [Member]	Dec. 31, 2012 Technology support [Member]	Dec. 31, 2013 General and administrative [Member]	Dec. 31, 2012 General and administrative [Member]	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2013 Service-Based Options [Member]	Dec. 31, 2012 Service-Based Options [Member]	Dec. 31, 2013 Performance-Based Options [Member]	Dec. 31, 2012 Performance-Based Options [Member]	Dec. 31, 2013 Market Condition Options [Member]	Dec. 31, 2012 Market Condition Options [Member]	Dec. 31, 2009 Market Condition Options [Member]	Sep. 17, 2010 Warrant [Member]	Dec. 31, 2013 Warrant [Member]	Dec. 31, 2013 Promissory note [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock reserved for future issuance (in shares)		388,971												400,000
Share-based compensation expense		$ 706,000	$ 915,000			$ 50,000	$ 46,000	$ 153,000	$ 225,000	$ 206,000	$ 288,000	$ 297,000	$ 356,000
Amount capitalized to internal use software		2,000	5,000
Total share-based compensation expense		704,000	910,000
Unrecognized compensation expense		600,000	800,000
Weighted average period for recognition of unrecognized compensation expense		1 year 6 months
Contractual term of options				7 years	10 years
Vesting Period		3 years
Weighted average grant date fair value (in dollars per share)														$ 2.57	$ 2.37	$ 2.37	$ 2.31	$ 2.19	$ 2.39			$ 0.97
Weighted average assumptions [Abstract]
Expected volatility (in hundredths)		65.00%	84.00%
Expected risk-free interest rate (in hundredths)		0.80%	0.60%
Expected life (years)		4 years 3 months 18 days	4 years 2 months 12 days
Number of Options [Roll Forward]
Outstanding at December 31, 2011 (in shares)		1,559,339
Granted (in shares)		289,258														113,500	80,900	87,117	249,199			213,650
Exercised (in shares)		(54,337)												54,337	10,982					5,879	9,206
Forfeited or expired (in shares)		(162,457)
Outstanding at December 31, 2012 (in shares)		1,631,803	1,559,339
Vested and expected to vest at December 31, 2012 (in shares)		1,599,601
Exercisable at December 31, 2012 (in shares)		1,247,384
Weighted Average Exercise Price per Share [Roll Forward]
Outstanding at December 31, 2011 (in dollars per share)		$ 6.12
Granted (in dollars per share)		$ 5.22																$ 4.00	$ 3.90			$ 1.75
Exercised (in dollars per share)		$ 3.92												$ 3.92	$ 1.97
Forfeited or expired (in dollars per share)		$ 10.60
Outstanding at December 31, 2012 (in dollars per share)		$ 5.59	$ 6.12
Vested and expected to vest at December 31, 2012 (in dollars per share)		$ 5.59
Exercisable at December 31, 2012 (in dollars per share)		$ 5.78
Weighted Average Remaining Contractual Term [Roll Forward]
Outstanding		4 years 10 months 24 days	5 years 7 months 6 days
Vested and expected to vest at December 31, 2012		4 years 10 months 24 days
Exercisable at December 31, 2012		4 years 6 months
Aggregate Intrinsic Value [Roll Forward]
Outstanding		16,453,000
Vested and expected to vest at December 31, 2012		16,142,000
Exercisable at December 31, 2012		12,541,000
Number of options vested based on revenues and EBITDA (in shares)																		83,398	161,394
Total intrinsic value of options exercised														60,000	21,000
Number of rights to purchase each share of common stock (in shares)		5
Number of Series A Participating Preferred Stock to be purchased on entitlement of right		0.001
Price of Series A Junior Participating Preferred Stock (in dollars per share)		$ 8.00																					$ 4.65
Percentage of ownership to trigger rights (in hundredths)		4.90%
Warrants to purchase common stock (in shares)	400,000
Exercise price of warrants (in dollars per share)		$ 8.00																					$ 4.65
Fair value of warrant (in dollars per share)																							$ 3.15
Warrant to purchase 2,000,000 shares of Company Common Stock	$ 1,260,000
Risk free rate (in hundredths)																							2.30%
Stock price volatility (in hundredths)	77.50%																						77.50%
Term																							8 years 0 months 14 days
Shares of common stock reserved for future issuance [Abstract]
Stock options outstanding (in shares)		1,631,803	1,559,339
Authorized (in shares)		388,971												400,000
Reserved for future issuance (in shares)		3,496,042																						400,000	1,075,268