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Note 10 - Fair Value of Assets and Liabilities - Fair Value Measurements, Recorded (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets:
Embedded customer derivatives	$ 21
Total assets at fair value	21	$ 382
Liabilities:
Total liabilities recorded at fair value	21	387
Embedded customer derivatives		382
Metal Swaps [Member]
Assets:
Metal Swaps		382
Liabilities:
Metal swaps	21
Interest Rate Swap [Member]
Liabilities:
Metal swaps		5
Fair Value, Inputs, Level 1 [Member]
Assets:
Embedded customer derivatives
Total assets at fair value
Liabilities:
Total liabilities recorded at fair value
Embedded customer derivatives
Fair Value, Inputs, Level 1 [Member] | Metal Swaps [Member]
Assets:
Metal Swaps
Liabilities:
Metal swaps
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Liabilities:
Metal swaps
Fair Value, Inputs, Level 2 [Member]
Assets:
Embedded customer derivatives	21
Total assets at fair value	21	382
Liabilities:
Total liabilities recorded at fair value	21	387
Embedded customer derivatives		382
Fair Value, Inputs, Level 2 [Member] | Metal Swaps [Member]
Assets:
Metal Swaps		382
Liabilities:
Metal swaps	21
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Liabilities:
Metal swaps		5
Fair Value, Inputs, Level 3 [Member]
Assets:
Embedded customer derivatives
Total assets at fair value
Liabilities:
Total liabilities recorded at fair value
Embedded customer derivatives
Fair Value, Inputs, Level 3 [Member] | Metal Swaps [Member]
Assets:
Metal Swaps
Liabilities:
Metal swaps
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Liabilities:
Metal swaps

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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-Paragraph 4B
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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Fair value of financial and nonfinancial obligations.

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