Note 3 - Investments and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

(In thousands)
December 31, 2022	Level 1		Level 2		Level 3		Total
Contingent Consideration	$	—	$	—	$	570	$	570
Front Line Power Construction seller financed debt, net of discount		—		68,753		—		68,753
Financial instrument liability - related to Syndicated debt		—		—		536		536
Financial instrument liability - related to Front Line Power Construction seller financed debt		—		—		43,693		43,693
Prepaid advance agreement		—		1,829		—		1,829
Warrant liability		—		—		1,777		1,777
Total liabilities	$	—	$	70,582	$	46,576	$	117,158

December 31, 2021	Level 1		Level 2		Level 3		Total
Contingent Consideration	$	—	$	—	$	720	$	720
Front Line Power Construction seller financed debt, net of discount		—		86,183		—		86,183
Financial instrument liability		—		—		825		825
Total liabilities	$	—	$	86,183	$	1,545	$	87,728

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Fair Value Measurements
Using Significant Unobservable Inputs (Level 3 - recurring basis)
(In thousands)	Financial Instrument Liability -related to Front Line Power Construction Seller Financed Debt
Balance at December 31, 2021	$	—
Fair value of financial instrument liability at inception		26,782
Fair value adjustment to financial instrument liability		16,911
Balance at December 31, 2022	$	43,693

Fair Value Measurements
Using Significant Unobservable Inputs (Level 3 - recurring basis)
(In thousands)	Contingent Consideration
Balance at December 31, 2021	$	720
Fair value adjustment		(150	)
Balance at December 31, 2022	$	570

Fair Value Measurements
Using Significant Unobservable Inputs (Level 3 - recurring basis)
(In thousands)	Financial Instrument Liability - related
	to Syndicated debt
Balance at December 31, 2021	$	825
Issuance of shares upon exercise and reset of financial instrument		(7,667	)
Fair value adjustment to financial instrument liability		7,378
Balance at December 31, 2022	$	536

Fair Value Measurements
Using Significant Unobservable Inputs (Level 3 - recurring basis)
(In thousands)	Warrant Liability
Balance at December 31, 2021	$	—
Proceeds from sale of warrants including pre-funded warrants		19,800
Exercise of pre-funded warrants, net of exercise proceeds		(6,938	)
Fair value adjustment to warrant liability		(11,085	)
Balance at December 31, 2022	$	1,777