Note 15 - Derivatives and Hedging Activities - Derivatives Not Designated as Hedging (Details) - Not Designated as Hedging Instrument [Member]	3 Months Ended
	Sep. 30, 2023 oz $ / oz
Commodity Contract 2024 [Member]
Derivatives, Fair Value [Line Items]
Volume (Ounce) | oz	21,100
Weighted average price (in USD per Ounce) | $ / oz	2,025
Commodity Contract 2025 [Member]
Derivatives, Fair Value [Line Items]
Volume (Ounce) | oz	62,400
Weighted average price (in USD per Ounce) | $ / oz	2,025
Commodity Contract 2026 [Member]
Derivatives, Fair Value [Line Items]
Volume (Ounce) | oz	41,100
Weighted average price (in USD per Ounce) | $ / oz	2,025