Represents number of acre-feet of water per annum to customer for water supply agreement.

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options outstanding, including both vested and non-vested options.

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Number of shares issued under share-based payment arrangement.

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Number of share options (or share units) exercised during the current period.

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Note 4 - Stock-based Compensation Plans (Details Textual) $ in Thousands	1 Months Ended	9 Months Ended
	Apr. 30, 2021 shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)		15,000
Share-based Payment Arrangement, Expense \| $		$ 4,100	$ 1,800
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)		0
Water Supply Agreement, Number of Acre-feet of Water Per Annum To Customer	9,500
Payment, Tax Withholding, Share-based Payment Arrangement \| $		$ 1,184	(0)
Two Thousand Nineteen Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		1,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)		82,404
Two Thousand Nineteen Equity Incentive Plan [Member] \| Directors, Consultants and Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)		1,117,596
Two Thousand Nineteen Equity Incentive Plan [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)		14,243
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense \| $		$ 0	$ 0
Restricted Stock Units (RSUs) [Member]
Payment, Tax Withholding, Share-based Payment Arrangement \| $		$ 1,200
Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	825,000
Milestone RSUs [Member] \| Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	510,000
Milestone RSUs [Member] \| Share-based Payment Arrangement, Employee [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	255,000
Milestone RSUs [Member] \| Share-based Payment Arrangement, Employee [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	255,000
Non-milestone Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	315,000
Non-milestone Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Employee [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	60,000
Non-milestone Restricted Stock Units (RSUs) [Member] \| Share-based Payment Arrangement, Employee [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)		158,673
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	255,000