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Note 8 - Leases - Leases Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Amortization of finance lease assets |  | $ 150 | $ 139 | $ 435 | $ 411
Interest on finance lease liabilities |  | 64 | 27 | 139 | 81
Total finance lease costs |  | 214 | 166 | 574 | 492
Operating lease cost |  | 764 | 724 | 2,340 | 2,265
Short-term lease cost |  | 196 | 166 | 483 | 470
Variable lease cost | [1] | 198 | 185 | 586 | 570
Sublease income |  | (45) | (32) | (136) | (120)
Total operating lease costs |  | 1,113 | 1,043 | 3,273 | 3,185
Total lease cost |  | $ 1,327 | $ 1,209 | 3,847 | 3,677
Operating cash outflow from operating leases |  |  |  | $ 2,638 | $ 2,626
Weighted-average remaining lease term-finance leases at end of period (in years) (Year) |  | 1 year 255 days | 1 year 36 days | 1 year 255 days | 1 year 36 days
Weighted-average remaining lease term-operating leases at end of period (in years) (Year) |  | 10 years 73 days | 10 years 292 days | 10 years 73 days | 10 years 292 days
Weighted-average discount rate-finance leases at end of period |  | 8.90% | 8.70% | 8.90% | 8.70%
Weighted-average discount rate-operating leases at end of period |  | 8.90% | 9.00% | 8.90% | 9.00%
[1] | Variable lease costs consist primarily of taxes, insurance, utilities, and common area or other maintenance costs for the Company's leased facilities and equipment.

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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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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 (g)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 2: 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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