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Lease Arrangements - Components of Lease Expense (Details) - Selling, General and Administrative Expenses [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Leases [Line Items] |  |  |  |  |
Operating lease cost | [1] | $ 163 | $ 133 | $ 546 | $ 392
Amortization of lease assets |  | 684 | 706 | 2,098 | 2,155
Interest on lease liabilities |  | 242 | 258 | 715 | 765
Total lease cost |  | $ 1,089 | $ 1,097 | $ 3,359 | $ 3,312
[1] | Includes short-term leases and variable lease costs, which are not significant for the three and nine months ended September 30, 2021 and 2020.

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- Definition Leases line item. + References No definition available. + Details
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- Definition Amount of interest expense on finance lease liability. + References No definition available. + Details
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- Definition Amount of amortization expense attributable to right-of-use asset from operating lease. + References No definition available. + Details
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- Definition 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. + References Reference 1: 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=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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- Details
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