Stockholders' Equity and Stock-based Compensation Expense (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs and Stock repurchase program [Line Items]
Stock-based compensation expense	$ 625,000	$ 820,000
Number of shares of common stock issued (in shares)	248,001
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock granted (in shares)	137,000
Unrecognized compensation expense, net of projected forfeitures	3,500,000
Period for Recognition	2 years 6 months
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock granted (in shares)	132,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock granted (in shares)	5,000
Cost of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs and Stock repurchase program [Line Items]
Stock-based compensation expense	132,000	159,000
Sales and Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs and Stock repurchase program [Line Items]
Stock-based compensation expense	71,000	199,000
Research and Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs and Stock repurchase program [Line Items]
Stock-based compensation expense	124,000	101,000
General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs and Stock repurchase program [Line Items]
Stock-based compensation expense	$ 298,000	$ 361,000