Note 16 - Subsequent Events - Schedule Of Natural Gas Derivative Instruments (Details) - Not Designated as Hedging Instrument [Member] - Forecast [Member]	3 Months Ended
	Mar. 31, 2026 MMBTU $ / MMBTU	Dec. 31, 2025 MMBTU $ / MMBTU	Sep. 30, 2025 MMBTU $ / MMBTU	Jun. 30, 2025 MMBTU $ / MMBTU	Mar. 31, 2025 MMBTU $ / MMBTU
Natural Gas Derivative Swap Q1 2025 [Member]
Derivative, Nonmonetary Notional Amount, Energy Measure (Millions of British Thermal Unit) | MMBTU					10,333
Derivative, Swap Type, Fixed Price (in USD per Millions of British Thermal Unit) | $ / MMBTU					4.43
Natural Gas Derivative Swap Q2 2025 [Member]
Derivative, Nonmonetary Notional Amount, Energy Measure (Millions of British Thermal Unit) | MMBTU				30,000
Derivative, Swap Type, Fixed Price (in USD per Millions of British Thermal Unit) | $ / MMBTU				4.43
Natural Gas Derivative Swap Q3 2025 [Member]
Derivative, Nonmonetary Notional Amount, Energy Measure (Millions of British Thermal Unit) | MMBTU			30,000
Derivative, Swap Type, Fixed Price (in USD per Millions of British Thermal Unit) | $ / MMBTU			4.43
Natural Gas Derivative Swap Q4 2025 [Member]
Derivative, Nonmonetary Notional Amount, Energy Measure (Millions of British Thermal Unit) | MMBTU		30,000
Derivative, Swap Type, Fixed Price (in USD per Millions of British Thermal Unit) | $ / MMBTU		4.43
Natural Gas Derivative Swap Q1 2026 [Member]
Derivative, Nonmonetary Notional Amount, Energy Measure (Millions of British Thermal Unit) | MMBTU	19,667
Derivative, Swap Type, Fixed Price (in USD per Millions of British Thermal Unit) | $ / MMBTU	4.43