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Leases - Summary of Lease Costs and Other Information to Company's Finance and Operating Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2020
Lease Cost |  |  |
Amortization of financing lease right-of-use assets | $ 138 | $ 250 | $ 0
Interest on finance lease liabilities | 25 | 46 |
Operating lease cost | 53 | 105 |
Short-term lease cost | 134 | 249 |
Variable lease cost | 0 | 0 |
Total lease cost | 350 | 650 |
Cash paid for amounts included in the measurement of lease liability – finance leases | 340 | 340 |
Cash paid for amounts included in the measurement of lease liability – operating leases | $ 52 | $ 52 |
Weighted-average remaining lease term – finance leases | 2 years | 2 years |
Weighted-average remaining lease term – operating leases | 4 years 8 months 1 day | 4 years 8 months 1 day |
Weighted-average discount rate – finance leases | 10.20% | 10.20% |
Weighted-average discount rate – operating leases | 10.40% | 10.40% |

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 + Details
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- Definition Amount of amortization expense attributable to right-of-use asset 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 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 + Details
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