Note 15 - Subsequent Events - Schedule of Natural Gas Derivatives (Details) - Natural Gas Derivative Swap [Member] - Not Designated as Hedging Instrument [Member] - Forecast [Member]	3 Months Ended
	Mar. 31, 2027 MMBTU $ / MMBTU	Dec. 31, 2026 MMBTU $ / MMBTU	Sep. 30, 2026 MMBTU $ / MMBTU	Jun. 30, 2026 MMBTU $ / MMBTU	Mar. 31, 2026 MMBTU $ / MMBTU	Dec. 31, 2025 MMBTU $ / MMBTU	Sep. 30, 2025 MMBTU $ / MMBTU	Jun. 30, 2025 MMBTU $ / MMBTU
MMBtu Per Day (Millions of British Thermal Unit) | MMBTU	19,667	30,000	30,000	30,000	19,667	30,000	30,000	30,000
Price per MMBtu (in USD per Millions of British Thermal Unit) | $ / MMBTU	4.3	4.3	4.3	4.3	4.43	4.43	4.43	4.43
Net Investment Hedging [Member]
MMBtu Per Day (Millions of British Thermal Unit) | MMBTU					10,333
Price per MMBtu (in USD per Millions of British Thermal Unit) | $ / MMBTU					4.3