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Revenue from Contracts with Customers - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
source
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Disaggregation of Revenue [Line Items]                    
Sources of revenue | source     3              
Return period     1 year              
Deferred revenue $ 17,241,000 $ 15,019,000 $ 17,241,000 $ 15,019,000 $ 17,241,000 $ 15,019,000 $ 15,619,000 $ 14,837,000 $ 13,656,000 $ 12,529,000
Amortization period 3 years   3 years   3 years          
Contract asset, impairment loss $ 0 $ 0 $ 0 $ 0            
Hardware and other                    
Disaggregation of Revenue [Line Items]                    
Reserve for hardware returns         1.00% 1.00%        
Activation Fees                    
Disaggregation of Revenue [Line Items]                    
Deferred revenue $ 5,600,000   $ 5,600,000   $ 5,600,000     $ 6,000,000    
Activation Fees | Maximum                    
Disaggregation of Revenue [Line Items]                    
Deferred revenue recognition period     10 years              
Activation Fees | Minimum                    
Disaggregation of Revenue [Line Items]                    
Deferred revenue recognition period     12 months