Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

v2.4.0.6
Acquisitions - Additional Information (Detail) (USD $)
12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jan. 31, 2012
Vigilan
Installment
Dec. 31, 2012
Vigilan
Jan. 31, 2012
Vigilan
Maximum
Jan. 31, 2012
Vigilan
Developed product technologies
Jan. 31, 2012
Vigilan
Customer Relationships
May 31, 2011
Compliance Depot
Installment
May 31, 2011
Compliance Depot
Maximum
May 31, 2011
Compliance Depot
Developed product technologies
May 31, 2011
Compliance Depot
Customer Relationships
Aug. 31, 2011
MTS
Dec. 31, 2012
MTS
Dec. 31, 2011
MTS
Aug. 31, 2011
MTS
Developed product technologies
Aug. 31, 2011
MTS
Customer Relationships
Nov. 30, 2010
Level One
Nov. 30, 2010
Level One
Developed product technologies
Nov. 30, 2010
Level One
Customer Relationships
Feb. 28, 2010
Domin-8
Feb. 28, 2010
Domin-8
Developed product technologies
Feb. 28, 2010
Domin-8
Customer Relationships
Jul. 31, 2012
RMO
Dec. 31, 2012
RMO
Jul. 31, 2012
RMO
Maximum
Jul. 31, 2012
RMO
Developed product technologies
Jul. 31, 2012
RMO
Customer Relationships
Dec. 31, 2012
SLN
Jul. 31, 2011
SLN
Jul. 31, 2011
SLN
Maximum
Jul. 31, 2011
SLN
Developed product technologies
Jul. 31, 2011
SLN
Customer Relationships
Jul. 31, 2010
eREI
Dec. 31, 2012
eREI
Dec. 31, 2011
eREI
Jul. 31, 2010
eREI
Maximum
Jul. 31, 2010
eREI
Developed product technologies
Jul. 31, 2010
eREI
Customer Relationships
Business Acquisition [Line Items]                                                                              
Direct acquisition costs       $ 100,000           $ 100,000     $ 800,000         $ 300,000     $ 900,000     $ 100,000           $ 100,000       $ 100,000          
Cost of acquired substantially all of the assets       5,000,000         22,500,000                 61,900,000     12,900,000                         8,600,000          
Preliminary cash payment       4,000,000         19,200,000       64,000,000         53,900,000           5,500,000           4,000,000       3,800,000          
Deferred per installment amount           500,000     1,100,000                                 3,500,000       250,000                  
Business acquisition, deferred payment to be made after acquisition date period in months first       12 months         6 months                                                            
Business acquisition, deferred payment to be made after acquisition date period in months second       24 months         12 months                                                            
Number of deferred installments       2         3                                                            
Amount withheld from purchase consideration subject to downward adjustment       1,000,000                                       3,500,000                              
Liability for future cash payment         1,000,000                                       100,000       200,000           0        
Amortized useful life of acquired intangible assets             3 years 10 years     3 years 9 years       3 years 10 years   3 years 9 years   3 years 9 years       3 years 10 years       3 years 10 years         3 years 10 years
Fair value of the common shares                                                 100,000                            
Acquisition-related contingent consideration of common stock                                               300,000             400,000                
Estimated fair value of the acquisition-related contingent consideration                                               200,000           300,000       800,000     1,800,000    
Estimated fair value of common shares and conversion option                                               300,000                              
Gain (Loss) recognized due to change in fair value of cash consideration 722,000 410,000 (8,000)                                           400,000       (100,000)           100,000 (100,000)      
Business acquisition, deferred payment to be made after acquisition date period in months third                 18 months                                                            
Business acquisition contingent consideration shares issued                                                         214,833                    
Estimate of the fair value of the common shares                         6,300,000                               8,400,000 8,400,000       3,300,000     4,400,000    
Maximum additional cash payable on acquisition                                                           500,000                  
Estimated of fair value of stock option exercisable                         3,600,000                                                    
Issuance of restricted common shares related to acquisition                         294,770                                         499,999          
Stock options exercisable                         349,693                                                    
Liability of put option                         1,200,000                                                    
Recognized gain in fair value for restricted shares                           300,000 600,000                                                
Cash deposited in Escrow                         14,000,000                                                    
Shares deposited in Escrow                         65,873                                                    
Half of amounts of escrow deposits release period after acquisition                         12 months                                                    
Remaining escrow deposit release period after acquisition                         18 months                                                    
Deferred payment maximum amount                                   8,000,000                                          
Borrowed amount related to acquisition                                   30,000,000                                          
Net proceeds from Initial public offering utilized for business acquisition   (775,000) 155,946,000                             24,000,000                                          
Business acquisition, deferred payment to be made after acquisition date period in months                                   18 months                                          
Percentage of outstanding stock acquired of eReal estate integration inc.                                                                   100.00%          
Deferred revenue acquired as contractual obligation                 2,380,000       164,000         352,000     4,502,000                                    
Business acquisition in interest expense 0 200,000                                                                          
Business acquisition in tax benefit 200,000 3,100,000                                                                          
Amortization charges from acquired intangible assets $ 500,000 $ 3,200,000