XML 52 R32.htm IDEA: XBRL DOCUMENT v3.22.0.1
Organization and Significant Accounting Policies - Additional Information (Details)
3 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
account
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Property, Plant and Equipment [Line Items]        
General and administrative   $ (43,853,000) $ (40,289,000) $ (43,278,000)
Cost of revenue   32,574,000 31,355,000 32,581,000
Commissions expense   4,400,000 4,300,000 5,000,000
Goodwill, impairment loss   $ 0 25,007,000 8,900,000
Capitalized computer software, impairments $ 15,700,000      
Number of significant allowance accounts | account   2    
Contractor fee, annual percentage increase   2.10%    
Uncertain tax positions $ 0 $ 0 0  
Advertising expenses   1,400,000 1,300,000 1,700,000
Provisions for doubtful accounts, service credits and other   700,000 1,100,000 700,000
Revision of Prior Period, Reclassification, Adjustment        
Property, Plant and Equipment [Line Items]        
General and administrative   3,300,000 2,800,000 2,500,000
Cost of revenue   $ 3,300,000 $ 2,800,000 $ 2,500,000
Minimum        
Property, Plant and Equipment [Line Items]        
Useful life   1 year    
Maximum        
Property, Plant and Equipment [Line Items]        
Useful life   5 years    
Paging Equipment Assets | Minimum        
Property, Plant and Equipment [Line Items]        
Useful life   1 year    
Paging Equipment Assets | Maximum        
Property, Plant and Equipment [Line Items]        
Useful life   5 years    
Capitalized software development costs        
Property, Plant and Equipment [Line Items]        
Useful life   3 years    
Customer relationships        
Property, Plant and Equipment [Line Items]        
Amortization of intangible assets   10 years