Note 12 - Debt - Component of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Apr. 30, 2020
Long term debt, principal	$ 314,072	$ 300,667
Carrying value	292,715	268,288
Long term debt, fair value	308,494	290,372
Paycheck Protection Program CARES Act [Member]
Long term debt, fair value			$ 2,900
Notes Payable to Banks [Member]
Long term debt, principal	27,186	25,700
Carrying value	26,717	25,303
Long term debt, fair value	26,751	25,893
Notes Payable to Banks [Member] | Ravix Bank Loan [Member]
Long term debt, principal	6,000	0
Carrying value	5,847	0
Long term debt, fair value	5,936	0
Notes Payable to Banks [Member] | The 2020 KWH Bank Loan [Member]
Long term debt, principal	21,186	25,700
Carrying value	20,870	25,303
Long term debt, fair value	20,815	25,893
Loans Payable [Member]
Long term debt, principal	196,386	184,467
Carrying value	205,025	192,057
Long term debt, fair value	220,770	213,551
Loans Payable [Member] | Mortgage [Member]
Long term debt, principal	161,998	166,106
Carrying value	168,730	173,696
Long term debt, fair value	182,128	194,158
Loans Payable [Member] | Additional Mortgage [Member]
Long term debt, principal	14,514	0
Carrying value	12,901	0
Long term debt, fair value	15,104	0
Loans Payable [Member] | RoeCo Mortgage [Member]
Long term debt, principal	13,463	0
Carrying value	16,983	0
Long term debt, fair value	16,437	0
Loans Payable [Member] | Flower Note [Member]
Long term debt, principal	6,411	6,885
Carrying value	6,411	6,885
Long term debt, fair value	7,101	7,863
Loans Payable [Member] | Net Lease Note [Member]
Long term debt, principal	0	9,000
Carrying value	0	9,000
Long term debt, fair value	0	9,054
Loans Payable [Member] | Paycheck Protection Program CARES Act [Member]
Long term debt, principal	0	2,476
Carrying value	0	2,476
Long term debt, fair value	0	2,476
Subordinated Debt [Member]
Long term debt, principal	90,500	90,500
Carrying value	60,973	50,928
Long term debt, fair value	$ 60,973	$ 50,928