Note 9 - Debt - Notes Payable - Other (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Apr. 15, 2021	Dec. 31, 2020
Notes payable, other	$ 66,825		$ 1,254
Notes payable, other	66,825		1,254
Less current portion	(165)		(807)
Long-term portion	66,660		447
Notes Payable, Other Payables [Member]
Notes payable, other	66,825
Notes payable, other	$ 66,825
The 2021 Bonds [Member]
Interest rate		1.50%
The 2021 Bonds [Member] \| Notes Payable, Other Payables [Member]
Interest rate	1.50%
Maturity Date	Jan. 31, 2042
Notes payable, other	$ 66,303		0
Notes payable, other	$ 66,303		0
SBA Loans [Member] \| Notes Payable, Other Payables [Member]
Interest rate	1.00%
Maturity Date	Apr. 30, 2025
Notes payable, other	$ 344		1,006
Notes payable, other	344		1,006
Notes Payable, Equipment [Member] \| Notes Payable, Other Payables [Member]
Notes payable, other	178		248
Notes payable, other	$ 178		$ 248
Notes Payable, Equipment [Member] \| Notes Payable, Other Payables [Member] \| Minimum [Member]
Interest rate	4.00%
Maturity Date	Feb. 28, 2022
Notes Payable, Equipment [Member] \| Notes Payable, Other Payables [Member] \| Maximum [Member]
Interest rate	5.00%
Maturity Date	Dec. 31, 2024

Contractual interest rate for funds borrowed, under the debt agreement.

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