Note 11 - Stock-based Compensation (Details Textual) - The 2019 Omnibus Incentive Plan [Member] - USD ($)		3 Months Ended
Dec. 22, 2021	Mar. 31, 2023	May 08, 2019
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	26,072,542		11,072,542
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized	15,000,000.0
Ownership Percentage	50.30%
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 190,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		4,200,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		2 years 3 months 18 days
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense		$ 160
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		240,000
Share-Based Payment Arrangement, Expense		45,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Other Than Options, Grants in Period, Grant Date Fair Value		$ 137,000

Represents the holders of the company's outstanding voting securities.

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- Definition

The grant fate fair value of award other than options granted during the reporting period.

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- Definition

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

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-Name Accounting Standards Codification
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Number of additional 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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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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