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Leases - Narrative (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
hub
Dec. 31, 2021
USD ($)
Mar. 31, 2018
hub
Lessee, Lease, Description [Line Items]        
Operating lease expense $ 544 $ 977    
Short-term lease costs 55 57    
Sublease income 35 $ 34    
Finance lease term       5 years
Number of satellite hubs leased | hub       3
Number of satellite hubs disposed | hub   2    
Finance lease, gross cost 127,633   $ 124,374  
Finance lease, accumulated depreciation $ 67,032   $ 64,260  
Leased assets, useful life 5 years      
Capital asset depreciation expense $ 45 $ 45    
Net investment in lease, current 3,813      
Net investment in lease, noncurrent 6,119      
Sales-type lease, interest income 207 $ 231    
Lessor, operating lease, term of contract     3 years  
Lessor, operating lease, gross costs 1,735      
Lessor, operating lease, accumulated depreciation $ 236      
Lessor, operating lease, useful life 5 years      
Depreciation expense $ 82      
Lease revenue $ 126      
Minimum        
Lessee, Lease, Description [Line Items]        
Sales-type leases, term of contracts 3 years      
Maximum        
Lessee, Lease, Description [Line Items]        
Sales-type leases, term of contracts 5 years      
Assets Held Under Finance Leases        
Lessee, Lease, Description [Line Items]        
Finance lease, gross cost $ 1,268      
Finance lease, accumulated depreciation $ 755      
Leased assets, useful life 7 years