Number of Satellite Hubs Leased

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Term of lessor's sales-type 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 of net investment in sales-type and direct financing lease, classified as noncurrent.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of interest income from net investment in sales-type lease.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of sublease income excluding finance and operating lease expense.

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Leases - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
Leases - Narrative (Details) $ in Thousands	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2018 hub
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 435	$ 1,264	$ 2,688	$ 3,796
Short-term lease costs	65	42	188	137
Sublease income	34	32	101	98
Finance lease term						5 years
Number of satellite hubs leased \| hub						3
Finance lease, gross cost	116,794		116,794		$ 107,618
Finance lease, accumulated depreciation	60,910		$ 60,910		$ 54,034
Leased assets, useful life			5 years
Capital asset depreciation expense	110	110	$ 329	329
Net investment in lease, current	4,308		4,308
Net investment in lease, noncurrent	7,844		7,844
Sales-type lease, interest income	223	$ 177	623	$ 508
Assets Held Under Finance Leases
Lessee, Lease, Description [Line Items]
Finance lease, gross cost	3,068		3,068
Finance lease, accumulated depreciation	$ 1,174		$ 1,174
Leased assets, useful life			7 years
Minimum
Lessee, Lease, Description [Line Items]
Sales-type leases, term of contracts	3 years		3 years
Maximum
Lessee, Lease, Description [Line Items]
Sales-type leases, term of contracts	5 years		5 years