Note 11 - Debt - Component of Debt (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 21, 2020	Apr. 30, 2020
Long term debt, principal	$ 299,706,000	$ 300,667,000
Carrying value	272,543,000	268,288,000
Long term debt, fair value	287,711,000	290,372,000
KWH Bank Loan [Member]
Long term debt, principal			$ 2,500,000
Paycheck Protection Program CARES Act [Member]
Long term debt, fair value				$ 2,900,000
Notes Payable to Banks [Member]
Long term debt, principal	23,539,000	25,700,000
Carrying value	23,182,000	25,303,000
Long term debt, fair value	23,915,000	25,893,000
Notes Payable to Banks [Member] | KWH Bank Loan [Member]
Long term debt, principal	23,539,000	25,700,000
Carrying value	23,182,000	25,303,000
Long term debt, fair value	23,915,000	25,893,000
Loans Payable [Member]
Long term debt, principal	185,667,000	184,467,000
Carrying value	191,143,000	192,057,000
Long term debt, fair value	205,578,000	213,551,000
Loans Payable [Member] | Mortgage [Member]
Long term debt, principal	164,123,000	166,106,000
Carrying value	171,280,000	173,696,000
Long term debt, fair value	182,871,000	194,158,000
Loans Payable [Member] | Additional Mortgage [Member]
Long term debt, principal	14,893,000	0
Carrying value	13,212	0
Long term debt, fair value	15,366	0
Loans Payable [Member] | Flower Note [Member]
Long term debt, principal	6,651,000	6,885,000
Carrying value	6,651,000	6,885,000
Long term debt, fair value	7,341,000	7,863,000
Loans Payable [Member] | Net Lease Note [Member]
Long term debt, principal	0	9,000,000
Carrying value	0	9,000,000
Long term debt, fair value	0	9,054,000
Loans Payable [Member] | Paycheck Protection Program CARES Act [Member]
Long term debt, principal	0	2,476,000
Carrying value	0	2,476,000
Long term debt, fair value	0	2,476,000
Subordinated Debt [Member]
Long term debt, principal	90,500,000	90,500,000
Carrying value	58,218,000	50,928,000
Long term debt, fair value	$ 58,218,000	$ 50,928,000