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Represent the maximum debt to adjusted EBITDA ratio pursuant the loan agreement.

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Represents the equity capital to total assets ratio pursuant the loan agreement.

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Represent the minimum equity capital pursuant the loan agreement.

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Number of repayment installments required under debt instrument.

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Amount of income recognized related to transferable production tax credits.

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Represents the amount of proceeds received during the period from payments on accounts receivable that were overdue.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

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The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

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Face amount or stated value per share of common stock.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments including both interest and principal payments.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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The cash inflow from the additional capital contribution to the entity.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Per share or per unit amount of equity securities issued.

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Number of new stock issued during the period.

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Note 1 - General and Basis of Presentation 1 (Details Textual) $ / shares in Units, $ in Thousands				1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	Apr. 23, 2023 USD ($)	Mar. 14, 2023 USD ($) $ / shares shares	Feb. 27, 2023 USD ($)	Jul. 31, 2023 USD ($)	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) $ / shares
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares		$ 0.001			$ 0.001	$ 0.001		$ 0.001
Proceeds from Issuance of Common Stock						$ 341,663	$ 0
Repayments of Long-Term Debt						115,182	96,875
Cash, FDIC Insured Amount					$ 127,000	127,000		$ 10,000
Cash, Uninsured Amount					102,300	102,300		64,300
Accounts Receivable, after Allowance for Credit Loss, Current					148,060	148,060		$ 128,818
Income Related to Transferable Production Tax Credits					2,700		$ 4,500
Kenya Power and Lighting Co Limited [Member]
Accounts Receivable, Past Due					42,700	42,700
Kenya Power and Lighting Co Limited [Member] \| Subsequent Event [Member]
Proceeds, Overdue Accounts Receivable				$ 7,800
ENEE [Member]
Accounts Receivable, Past Due					10,700	$ 10,700
ENEE [Member] \| Subsequent Event [Member]
Proceeds, Overdue Accounts Receivable				$ 2,300
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Primary Customers [Member]
Concentration Risk, Percentage						60.00%		60.00%
Total Receivables [Member] \| Customer Concentration Risk [Member]
Financing Receivable, after Allowance for Credit Loss					97,300	$ 97,300		$ 89,800
Non-US [Member]
Accounts Receivable, after Allowance for Credit Loss, Current					$ 106,000	$ 106,000		$ 78,900
Goldman Sachs & Co. LLC [Member]
Proceeds from Issuance of Common Stock		$ 341,700
Public Offering [Member] \| Goldman Sachs & Co. LLC [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares		3,600,000
Shares Issued, Price Per Share (in dollars per share) \| $ / shares		$ 82.60
Over-Allotment Option [Member] \| Goldman Sachs & Co. LLC [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares		540,000
BHI Loan Agreement [Member]
Debt Instrument, Face Amount			$ 100,000
Debt Instrument, Number of Repayment Installment			20
Debt Instrument, Periodic Payment			$ 5,000
Debt Instrument, Term (Year)			10 years
Debt Instrument, Interest Rate, Stated Percentage			6.45%
Debt Instrument, Covenant, Minimum Equity Capital			$ 750,000
BHI Loan Agreement [Member] \| Maximum [Member]
Debt Instrument, Covenant, Debt to Adjusted EBITDA Ratio			6.00%
BHI Loan Agreement [Member] \| Minimum [Member]
Debt Instrument, Covenant, Equity Capital to Total Assets Ratio			25.00%
Plumstriker Loan Agreement [Member]
Repayments of Long-Term Debt	$ 11,100