Note 2 - Description of Business and Summary of Significant Accounting Policies - Schedule of Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 121,319	$ 138,324	$ 105,521	$ 136,807	$ 102,902	$ 111,916	$ 90,696	$ 119,688	$ 104,933	$ 125,048	$ 93,463	$ 105,264	$ 501,971	$ 425,202	$ 428,708
Sales Channel, Directly to Consumer [Member]
Revenues													397,852	354,993	327,716
Sales Channel, Through Intermediary [Member]
Revenues													80,597	47,622	79,051
Sales Channel, Other [Member]
Revenues													23,522	22,587	21,941
Fixed-Price Contract [Member]
Revenues													254,205	225,001	220,472
Time-and-Materials Contract [Member]
Revenues													224,244	177,614	186,295
Other Basis of Pricing Contract [Member]
Revenues													23,522	22,587	21,941
Electricity [Member]
Revenues													412,782	350,514	350,779
Electricity [Member] \| Sales Channel, Directly to Consumer [Member]
Revenues													346,990	318,541	289,774
Electricity [Member] \| Sales Channel, Through Intermediary [Member]
Revenues													65,792	31,973	61,005
Electricity [Member] \| Sales Channel, Other [Member]
Revenues													0	0	0
Electricity [Member] \| Fixed-Price Contract [Member]
Revenues													238,064	205,980	203,039
Electricity [Member] \| Time-and-Materials Contract [Member]
Revenues													174,718	144,534	147,740
Electricity [Member] \| Other Basis of Pricing Contract [Member]
Revenues													0	0	0
Oil and Gas [Member]
Revenues													65,667	52,101	55,988
Oil and Gas [Member] \| Sales Channel, Directly to Consumer [Member]
Revenues													50,862	36,452	37,942
Oil and Gas [Member] \| Sales Channel, Through Intermediary [Member]
Revenues													14,805	15,649	18,046
Oil and Gas [Member] \| Sales Channel, Other [Member]
Revenues													0	0	0
Oil and Gas [Member] \| Fixed-Price Contract [Member]
Revenues													16,141	19,021	17,433
Oil and Gas [Member] \| Time-and-Materials Contract [Member]
Revenues													49,526	33,080	38,555
Oil and Gas [Member] \| Other Basis of Pricing Contract [Member]
Revenues													0	0	0
Product and Service, Other [Member]
Revenues													23,522	22,587	21,941
Product and Service, Other [Member] \| Sales Channel, Directly to Consumer [Member]
Revenues													0	0	0
Product and Service, Other [Member] \| Sales Channel, Through Intermediary [Member]
Revenues													0	0	0
Product and Service, Other [Member] \| Sales Channel, Other [Member]
Revenues													23,522	22,587	21,941
Product and Service, Other [Member] \| Fixed-Price Contract [Member]
Revenues													0	0	0
Product and Service, Other [Member] \| Time-and-Materials Contract [Member]
Revenues													0	0	0
Product and Service, Other [Member] \| Other Basis of Pricing Contract [Member]
Revenues													$ 23,522	$ 22,587	$ 21,941