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Represents the minimum aggregate principal outstanding redemption debt amount.

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Face amount or stated value per share of common stock.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of interest capitalized during the period.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Note 7 - Convertible Senior Notes (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) $ / shares	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($)
Proceeds from Convertible Debt		$ 393,518	$ 0	$ 0
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares	$ 0.001	$ 0.001	$ 0.001
Interest Expense		$ 14,097	$ 5,208	2,882
Interest Paid, Excluding Capitalized Interest, Operating Activities		9,303	$ 3,152	$ 1,730
Reclassified From Construction in Progress to Assets Placed in Service [Member]
Interest Costs Capitalized		136
March 2023 Note [Member] \| Convertible Senior Notes [Member]
Debt Instrument, Face Amount	$ 402,500	$ 402,500
Debt Instrument, Interest Rate, Stated Percentage	3.00%	3.00%
Proceeds from Convertible Debt	$ 391,492
Debt Instrument, Convertible, Conversion Ratio	14.3516
Debt Instrument, Convertible, Conversion Price (in dollars per share) \| $ / shares	$ 69.68
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	130.00%
Debt Instrument, Convertible, Threshold Trading Days	20
Debt Instrument, Convertible, Threshold Consecutive Trading Days	30
Debt Instrument, Redemption Price, Percentage	100.00%
Debt Instrument, Interest Rate, Effective Percentage	3.59%
Debt Issuance Costs, Net	$ 11,008
Unamortized Debt Issuance Expense		$ 9,426
Interest Expense		9,426
Interest Paid, Excluding Capitalized Interest, Operating Activities		6,406
Accrued Interest		3,019
Interest Costs Capitalized		$ 1,207
March 2023 Note [Member] \| Convertible Senior Notes [Member] \| Minimum [Member]
Debt Instrument, Redemption, Minimum Aggregate Principal Outstanding	$ 100,000