Note 9 - Debt and Credit Agreements - Future Annual Principal Payments on Outstanding Debt Obligations (Details) $ in Thousands	Dec. 31, 2021 USD ($)
2022	$ 6,650
2023	28
2024	29
2025	30
2026	32
2027 and thereafter	58
Total	$ 6,827

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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