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Leases - Narrative (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Lessee, Lease, Description [Line Items]      
Total finance lease liabilities $ 771 $ 1,511 $ 1,880
Option to extend term 5 years    
Minimum | Cisco Systems Capital Corporation [Member]      
Lessee, Lease, Description [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage 2.89%    
Maximum | Cisco Systems Capital Corporation [Member]      
Lessee, Lease, Description [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage 3.50%