Note 8 - Debt - Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2022	Dec. 31, 2021
Issuance costs	$ 17
Mortgage Agreement [Member]
Interest rate	11.80%	10.30%
Interest rate, variable	7.00%	7.00%
Issuance costs	$ 17	$ 17
Original principal	$ 2,500	$ 2,500
Maturity date	Dec. 31, 2023	Dec. 31, 2023
Interest rate, effective rate	11.50%	11.50%
Equipment Notes, May 2021 [Member] \| Notes Payable, Other Payables [Member]
Original principal	$ 46	$ 46
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	$ 40
Maturity date	Dec. 31, 2024	Dec. 31, 2024
Interest rate, effective rate	9.30%	9.30%
Equipment Notes, November 2018 [Member] \| Notes Payable, Other Payables [Member]
Interest rate	4.80%	4.80%
Maturity date	Aug. 31, 2022	Aug. 31, 2022

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

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

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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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