Note 9 - Debt - Summary of Credit Facilities Outstanding (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
CD Senior Working Capital Facility [Member]
Total Facility Size	$ 500,000	[1]
Outstanding balance	0	[1]
Letters of credit issued	66,362	[1]
Available commitment	$ 433,638	[1]
Commitment fees on undrawn balance	0.68%	[1]
Maturity Date	Jul. 12, 2030	[1]
CD Senior Working Capital Facility [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Interest rate on outstanding balance	2.25%	[1]
CD Credit Facility [Member]
Total Facility Size	$ 9,963,000	[1]
Outstanding balance	327,000	[1]
Letters of credit issued	0	[1]
Available commitment	$ 9,636,000	[1]
Commitment fees on undrawn balance	0.68%	[1]
Maturity Date	Jul. 12, 2030	[1]
CD Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Interest rate on outstanding balance	2.25%	[1]
TCF Credit Facility [Member]
Total Facility Size	$ 800,000	[2]
Outstanding balance	26,000	[2]
Letters of credit issued	0	[2]
Available commitment	$ 774,000	[2]
Commitment fees on undrawn balance	0.68%	[2]
Maturity Date	Jul. 12, 2030	[2]
TCF Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Interest rate on outstanding balance	2.25%	[2]

[1] The obligations of Rio Grande under the CD Credit Agreement are secured by substantially all of the assets of Rio Grande as well as a pledge of all of the membership interests in Rio Grande on a first-priority basis, pari passu with the Senior Secured Notes, the Senior Secured Loans and the loans made under the TCF Credit Facility.

[2] The obligations of Rio Grande under the TCF Credit Agreement are secured by substantially all of the assets of Rio Grande as well as a pledge of all of the membership interests in Rio Grande on a first-priority basis, pari passu with the Senior Secured Notes, the Senior Secured Loans and the loans made under the CD Credit Agreement. Total Energies Holdings SAS (“Total Holdings”) provides contingent credit support to the lenders under the TCF Credit Agreement to pay past due amounts owing from Rio Grande under the agreement upon demand.