Note 23 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total, estimated fair value	$ 35,666	$ 20,716
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	179	444
Limited liability investments, at fair value	14,804	29,548
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively)	10,662	10,662
Subordinated debt, at fair value	60,973	50,928
Fair Value, Recurring [Member]
Total, estimated fair value	35,666	20,716
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	179	444
Limited liability investments, at fair value	18,826	32,811
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively)	10,662	10,662
Total assets	65,333	64,633
Subordinated debt, at fair value	60,973	50,928
Contingent consideration, at fair value	2,458
Stock-based compensation liabilities, at fair value	1,402	443
Total liabilities	64,847	51,371
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Derivative contract - interest rate swap	14
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total, estimated fair value	0	0
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	171	172
Limited liability investments, at fair value	0	0
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively)	0	0
Total assets	171	172
Subordinated debt, at fair value	0	0
Contingent consideration, at fair value	0
Stock-based compensation liabilities, at fair value	0	0
Total liabilities	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Derivative contract - interest rate swap	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total, estimated fair value	35,666	20,716
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	8	272
Limited liability investments, at fair value	0	0
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively)	0	0
Total assets	35,674	20,988
Subordinated debt, at fair value	60,973	50,928
Contingent consideration, at fair value	0
Stock-based compensation liabilities, at fair value	0	0
Total liabilities	60,987	50,928
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivative contract - interest rate swap	14
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total, estimated fair value	0	0
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	0
Limited liability investments, at fair value	4,022	3,263
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively)	10,662	10,662
Total assets	14,684	13,925
Subordinated debt, at fair value	0	0
Contingent consideration, at fair value	2,458
Stock-based compensation liabilities, at fair value	1,402	443
Total liabilities	3,860	443
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Derivative contract - interest rate swap	0
Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Total, estimated fair value	0	0
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	0
Limited liability investments, at fair value	14,804	29,548
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively)	0	0
Total assets	14,804	29,548
Subordinated debt, at fair value	0	0
Contingent consideration, at fair value	0
Stock-based compensation liabilities, at fair value	0	0
Total liabilities	0	0
Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Interest Rate Swap [Member]
Derivative contract - interest rate swap	0
US Government Agencies Debt Securities [Member]
Total, estimated fair value	16,223	10,104
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member]
Total, estimated fair value	16,223	10,104
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total, estimated fair value	0	0
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total, estimated fair value	16,223	10,104
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total, estimated fair value	0	0
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Total, estimated fair value	0	0
US States and Political Subdivisions Debt Securities [Member]
Total, estimated fair value	1,878	1,454
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Total, estimated fair value	1,878	1,454
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total, estimated fair value	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total, estimated fair value	1,878	1,454
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total, estimated fair value	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Total, estimated fair value	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Total, estimated fair value	7,629	5,394
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member]
Total, estimated fair value	7,629	5,394
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total, estimated fair value	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total, estimated fair value	7,629	5,394
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total, estimated fair value	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Total, estimated fair value	0	0
Asset-backed Securities [Member]
Total, estimated fair value	445
Asset-backed Securities [Member] | Fair Value, Recurring [Member]
Total, estimated fair value	445
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total, estimated fair value	0
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total, estimated fair value	445
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total, estimated fair value	0
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Total, estimated fair value	0
Corporate Debt Securities [Member]
Total, estimated fair value	9,491	3,764
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Total, estimated fair value	9,491	3,764
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Total, estimated fair value	0	0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Total, estimated fair value	9,491	3,764
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Total, estimated fair value	0	0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Total, estimated fair value	0	0
Common Stock [Member] | Fair Value, Recurring [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	171	155
Common Stock [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	171	155
Common Stock [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	0
Common Stock [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	0
Common Stock [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	0
Warrant [Member] | Fair Value, Recurring [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	8	289
Warrant [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	17
Warrant [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	8	272
Warrant [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	0	0
Warrant [Member] | Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Equity investments, at fair value (cost of $1,147 and $1,157, respectively)	$ 0	$ 0