Note 11 - Debt (Details Textual)					3 Months Ended			9 Months Ended		12 Months Ended
		Jun. 02, 2021 USD ($) a	Dec. 01, 2020 USD ($)	Dec. 16, 2003 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 21, 2020 USD ($)	Nov. 01, 2020	Apr. 30, 2020 USD ($)	Jul. 31, 2016 USD ($)	Oct. 15, 2015 USD ($)	Jan. 05, 2015 USD ($)
Long-term Debt, Gross					$ 297,415,000			$ 297,415,000		$ 300,667,000
Long-term Debt, Fair Value					289,806,000			289,806,000		290,372,000
Proceeds from Legal Settlements						$ 2,700,000
Proceeds from Notes Payable, Total								13,270,000	$ 2,858,000
Long-term Debt, Total					271,478,000			271,478,000		268,288,000
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax	[1]				(971,000)		$ (2,843,000)	(6,505,000)	$ 7,781,000
TEXAS
Area of Real Estate Property (Acre) | a		192
Mortgages [Member]
Long-term Debt, Fair Value														$ 191,700,000
Debt Instrument, Face Amount														180,000,000.0
Debt Instrument, Unamortized Premium, Total														$ 11,700,000
Debt Instrument, Interest Rate, Stated Percentage														4.07%
Loans Payable [Member]
Long-term Debt, Gross					184,302,000			184,302,000		184,467,000
Long-term Debt, Fair Value					205,159,000			205,159,000		213,551,000
Long-term Debt, Total					189,601,000			189,601,000		192,057,000
Subordinated Debt [Member]
Long-term Debt, Gross					90,500,000			90,500,000		90,500,000
Long-term Debt, Fair Value					59,601,000			59,601,000		50,928,000
Debt Instrument, Face Amount				$ 90,500,000
Long-term Debt, Total					59,601,000			59,601,000		50,928,000
Debt Instrument, Term (Year)				30 years
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings								8,700,000
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax								6,500,000		2,200,000
Interest Payable					17,600,000			17,600,000
Subordinated Debt [Member] | Accrued Expenses and Other Liabilities [Member]
Interest Payable					17,600,000			$ 17,600,000		14,100,000
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate				3.85%
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate				4.20%
KWH Bank Loan [Member]
Long-term Debt, Gross											$ 2,500,000
Debt Instrument, LIBOR Floor			0.75%
Debt Instrument, Interest Rate During Period								3.75%
Debt Issuance Costs, Net, Total					400,000			$ 400,000			400,000
Debt Instrument, Principal Value										2,500,000	$ 2,000,000.0
KWH Bank Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate			3.00%
KWH Bank Loan [Member] | PWI Holdings [Member]
Long-term Debt, Gross			$ 25,700,000
KWH Bank Loan [Member] | PWI Holdings [Member] | Revolving Credit Facility [Member]
Long-term Debt, Gross			1,000,000.0
KWH Bank Loan [Member] | PWI Holdings [Member] | Term Loan [Member]
Long-term Debt, Gross			$ 24,700,000
Additional Mortgage [Member] | Loans Payable [Member]
Long-term Debt, Gross					14,704,000			14,704,000		0
Long-term Debt, Fair Value					15,244			15,244		0
Proceeds from Notes Payable, Total		$ 15,000,000.0
Payment for Management Fee		10,400,000
Long-term Debt, Total					13,060			13,060		0
Additional Mortgage [Member] | TRT [Member] | Loans Payable [Member]
Debt Issuance Costs, Net, Total		1,700,000
Debt Instrument, Face Amount		$ 15,000,000.0
Debt Instrument, Interest Rate, Stated Percentage		3.20%
Flower Note [Member] | Loans Payable [Member]
Long-term Debt, Gross					6,532,000			6,532,000		6,885,000
Long-term Debt, Fair Value					7,294,000			7,294,000		7,863,000
Debt Instrument, Face Amount																$ 9,200,000
Debt Instrument, Interest Rate, Stated Percentage																4.81%
Long-term Debt, Total					6,532,000			6,532,000		6,885,000
Net Lease Note [Member] | Loans Payable [Member]
Long-term Debt, Gross					0			0		9,000,000
Long-term Debt, Fair Value					0			0		9,054,000
Debt Instrument, Face Amount															$ 9,000,000.0
Debt Instrument, Interest Rate, Stated Percentage												10.25%
Long-term Debt, Total					0			0		9,000,000
Paycheck Protection Program CARES Act [Member]
Long-term Debt, Fair Value													$ 2,900,000
Debt Instrument, Interest Rate, Stated Percentage													1.00%
Paycheck Protection Program CARES Act [Member] | Loans Payable [Member]
Long-term Debt, Gross					0			0		2,476,000
Long-term Debt, Fair Value					0			0		2,476,000
Long-term Debt, Total					$ 0			$ 0		$ 2,476,000

[1] Net of income tax benefit of $0 and $0 for the three and nine months ended September 30, 2021 and September 30, 2020, respectively.