Acquisitions - Purchase Price Allocation (Detail) (USD $)
 0 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jul. 19, 2011
Xively [Member]
Dec. 31, 2013
Xively [Member]
Jan. 06, 2012
Bold [Member]
Dec. 31, 2013
Bold [Member]
Dec. 31, 2013
Bold [Member]
Technology [Member]
Dec. 31, 2013
Bold [Member]
Trade Name and Trademark [Member]
Dec. 31, 2013
Bold [Member]
Customer Relationships [Member]
Dec. 31, 2013
Bold [Member]
Non-Compete Agreements [Member]
Business Acquisition [Line Items]                      
Tangible assets         $ 8,000            
Business acquisition, Intangible assets         3,250,000     1,090,000 30,000 2,760,000 160,000
Goodwill 18,712,000 18,883,000 7,259,000   6,935,000   11,178,000        
Total purchase price         10,193,000   15,314,000        
Liability for contingent consideration    (161,000) (212,000) (5,200,000) (193,000) (1,500,000)          
Cash paid       10,000,000 10,000,000 15,300,000          
Cash             482,000        
Current assets             126,000        
Other assets             19,000        
Deferred revenue             (424,000)        
Other liabilities             $ (107,000)