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Leases - Narrative (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Lessee, Lease, Description [Line Items] |  |  |
Total finance lease liabilities | $ 998 | $ 1,511 | $ 2,154
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 [Member] | Cisco Systems Capital Corporation [Member] |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.50% |  |

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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