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Note 9 - Fair Value of Assets and Liabilities - Fair Value Measurements, Recorded (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Total assets at fair value		$ 131
Embedded customer derivative		131
Total liabilities recorded at fair value	$ 5,620	4,335
Metal Swaps [Member]
Derivative liability		131
Interest Rate Swap [Member]
Derivative liability	5,620	4,204
Fair Value, Inputs, Level 1 [Member]
Total assets at fair value		0
Embedded customer derivative		0
Total liabilities recorded at fair value	0	0
Fair Value, Inputs, Level 1 [Member] | Metal Swaps [Member]
Derivative liability		0
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Derivative liability	0
Fair Value, Inputs, Level 2 [Member]
Total assets at fair value		131
Embedded customer derivative		131
Total liabilities recorded at fair value	5,620	4,335
Fair Value, Inputs, Level 2 [Member] | Metal Swaps [Member]
Derivative liability		131
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivative liability	5,620	4,204
Fair Value, Inputs, Level 3 [Member]
Total assets at fair value		0
Embedded customer derivative		0
Total liabilities recorded at fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Metal Swaps [Member]
Derivative liability		0
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Derivative liability	$ 0

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
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-Topic 820
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- Definition

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.

+ References

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- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as an asset.

+ References

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- Definition

Fair value of financial and nonfinancial obligations.

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