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Note 6 - Debt - Future Commitments (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Total financing debt	$ 64
Financing Agreement [Member]
2022	$ 64

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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