Number Of Satellite Hubs Disposed

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Number of Satellite Hubs Leased

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of net investment in sales-type and direct financing lease, classified as current.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Leases - Narrative (Details) $ in Thousands	3 Months Ended
Leases - Narrative (Details) $ in Thousands	Mar. 31, 2021 USD ($) hub	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2018 hub
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 977	$ 1,262
Short-term lease costs	57	61
Sublease income	$ 34
Finance lease term				5 years
Number of satellite hubs leased \| hub				3
Number of satellite hubs disposed \| hub	2
Finance lease, gross cost	$ 112,926		$ 114,265
Finance lease, accumulated depreciation	$ 55,815		$ 57,992
Leased assets, useful life	5 years
Capital asset depreciation expense	$ 45	45
Net investment in lease, current	4,354
Net investment in lease, noncurrent	7,351
Sales-type lease, interest income	231	$ 197
Assets Held Under Finance Leases
Lessee, Lease, Description [Line Items]
Finance lease, gross cost	1,268
Finance lease, accumulated depreciation	$ 574
Leased assets, useful life	7 years
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