v2.4.0.6
Summary of Business and Significant Accounting Policies (Details Textual) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended
Jun. 30, 2012
Customer
Jun. 30, 2011
Jun. 30, 2012
Customer
Jun. 30, 2011
Dec. 31, 2011
Customer
Jun. 30, 2012
Stock options and restricted units [Member]
Jun. 30, 2012
2012 ESPP [Member]
Jun. 30, 2012
Customer Concentration Risk [Member]
Customer
Jun. 30, 2011
Customer Concentration Risk [Member]
Customer
Jun. 30, 2012
Customer Concentration Risk [Member]
Customer
Jun. 30, 2011
Customer Concentration Risk [Member]
Customer
Mar. 31, 2012
Understatement [Member]
Summary of Business and Significant Accounting Policies (Textual) [Abstract]                        
Compensation expense recognized, vesting term     48 months     4 years 6 months          
Number of customers exceeded revenues               0 0 0 0  
Research and development $ 9,272,000 [1] $ 2,361,000 [1] $ 15,315,000 [1] $ 4,246,000 [1]               $ 700,000
Deferred revenue recognized, period     12 months                  
Summary of Business and Significant Accounting Policies (Additional Textual) [Abstract]                        
Compensation expense recognized, net of forfeiture activity, estimated annual percentage     4.00%                  
Number of customer accounted on accounts receivable balance 0   0   0              
Percentage of accounts receivable, customer accounted     10.00%   10.00%              
Percentage of revenues, customers exceeded individually     10.00% 10.00%                
Software development cost     $ 1,100,000 $ 0                
[1] Includes stock-based compensation as follows: Cost of revenues: Subscription $706, $167, $1238 and $323, Professional services and other $277, $42, $469 and $80, Sales and marketing $2,482, $285, $3,953 and $573, Research and development $1,541, $118, $2,202 and $261, General and administrative $1,451, $466, $2,513 and $596; for three months ended June 30, 2012 and 2011 and six months ended June 30, 2012 and 2011 respectively.