Note 9 - Debt - Long-term Debt (Details) (Parentheticals) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Mortgage Agreement [Member]
Interest rate	7.00%	7.00%
Interest rate, variable	14.50%	10.30%
Original principal	$ 2.5	$ 2.5
Maturity date	Jan. 31, 2025	Jan. 31, 2025
Progress Payment Agreement [Member]
Interest rate	25.20%
Original principal	$ 37,000
Equipment Notes, May 2021 [Member] \| Notes Payable, Other Payables [Member]
Original principal	$ 46,000	$ 46,000
Maturity date	Jun. 30, 2025	Jun. 30, 2025
Interest rate, effective rate	3.60%	3.60%
Equipment Notes, December 2019 [Member] \| Notes Payable, Other Payables [Member]
Original principal	$ 40,000	$ 40,000
Maturity date	Dec. 31, 2024	Dec. 31, 2024
Interest rate, effective rate	9.30%	9.30%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

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

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- Definition

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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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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