Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Details)

v3.6.0.2
Goodwill and Other Intangible Assets (Details)
 1 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
customer
Dec. 31, 2014
USD ($)
Goodwill [Line Items]            
Balance at the beginning of the period       $ 6,497,000    
Impairments       0    
Balance at the end of the period $ 6,497,000 $ 6,497,000   6,497,000 $ 6,497,000  
Goodwill, Impairment Loss       0    
Impairment of intangible assets         20,669,000 $ 35,221,000
Accumulated goodwill impairment       39,100,000    
Skyhook            
Goodwill [Line Items]            
Balance at the beginning of the period       6,497,000 27,166,000 20,669,000
Acquired           24,931,000
Impairments   (20,700,000)     (20,669,000) (18,434,000)
Balance at the end of the period $ 6,497,000 6,497,000 $ 27,166,000 6,497,000 6,497,000 27,166,000
Goodwill, Impairment Loss   $ 20,700,000     $ 20,669,000 $ 18,434,000
Deferred Revenue       $ 35,500,000    
Impairment of intangible assets     $ 35,200,000      
Skyhook | Minimum | Revenue            
Goodwill [Line Items]            
Percentage Expected Revenue Reduction From Loss Of Significant Customer 30          
Skyhook | Maximum | Revenue            
Goodwill [Line Items]            
Percentage Expected Revenue Reduction From Loss Of Significant Customer 40          
Customer concentration | Skyhook            
Goodwill [Line Items]            
Number of Customers | customer         1  
Significant customer | Customer concentration | Skyhook | Minimum | Revenue            
Goodwill [Line Items]            
Concentration Risk, Percentage 80.00%          
Significant customer | Customer concentration | Skyhook | Maximum | Revenue            
Goodwill [Line Items]            
Concentration Risk, Percentage 90.00%