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Note 15 - Asset Retirement Obligations (AROs) - Legal AROs, Capitalized Asset Retirement Costs and Accumulated Depreciation and a Settlement Activity Summary (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Asset Retirement Obligations |  |
Beginning Balance | $ 9,117 | $ 8,719
Asset Retirement Obligation, Liabilities Incurred | 0 | 0
Adjustments Due to Revisions in Cash Flow Estimates | 3,099 | 0
Accrued Accretion | 440 | 398
Settlements | 0 | 0
Ending Balance | 12,656 | 9,117
Asset Retirement Costs Capitalized |  |
Beginning Balance | 2,983 | 2,983
New Obligations Recognized | 0 | 0
Adjustments Due to Revisions in Cash Flow Estimates | 3,099 | 0
Settlements | 0 | 0
Ending Balance | 6,082 | 2,983
Accumulated Depreciation – Asset Retirement Costs Capitalized |  |
Beginning Balance | 1,034 | 915
New Obligations Recognized | 0 | 0
Adjustments Due to Revisions in Cash Flow Estimates | 0 | 0
Depreciation Expense | 163 | 119
Settlements | 0 | 0
Ending Balance | 1,197 | 1,034
Original Capitalized Asset Retirement Cost – Retired | 0 | 0
Accumulated Depreciation | 0 | 0
Asset Retirement Obligation | 0 | 0
Settlement Cost | 0 | 0
Gain on Settlement – Deferred Under Regulatory Accounting | $ 0 | $ 0

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- References No definition available. + Details
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- Definition Represents the amount of gain on settlement of an asset retirement obligation deferred under regulatory accounting. + References No definition available. + Details
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- Definition Represents the amount of asset retirement obligation settlements attributable to accumulated depreciation. + References No definition available. + Details
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- Definition Represents the amount of asset retirement obligation settlements during the period attributable to an asset retirement obligation. + References No definition available. + Details
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- Definition Represents the amount of asset retirement obligation settlements retired during the period attributable to original capitalized asset retirement cost. + References No definition available. + Details
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- Definition Represents the amount of asset retirement obligation settlements during the period attributable to settlement cost. + References No definition available. + Details
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- Definition Represents the amount of accumulated depreciation related to capitalized asset retirement costs as of a specified date. + References No definition available. + Details
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- Definition Represents the amount of change in accumulated depreciation during the period related to capitalized asset retirement costs, which change is attributable to depreciation expense. + References No definition available. + Details
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- Definition Represents the effect of liabilities incurred during the period on the accumulated depreciation related to capitalized asset retirement costs. + References No definition available. + Details
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- Definition Represents the amount of change in accumulated depreciation during the period related to capitalized asset retirement costs, which change is attributable to liabilities settled. + References No definition available. + Details
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- Definition Represents the amount of change in accumulated depreciation during the period related to capitalized asset retirement costs, which change is attributable to revisions in cash flow estimates. + References No definition available. + Details
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- Definition Represents the amount of liabilities incurred during the period capitalized as asset retirement costs. + References No definition available. + Details
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- Definition Represents the amount of adjustment to capitalized asset retirement costs during the period attributable to liabilities settled. + References No definition available. + Details
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- Definition Represents the amount of adjustment to capitalized asset retirement costs during the period attributable to revision of cash flow estimates. + References No definition available. + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 + Details
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- Definition Amount of asset retirement obligations incurred during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 35 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6392603&loc=d3e7123-110846 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61901-109447 + Details
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