Note 19 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 |
Total, estimated fair value | $ 34,339 | $ 20,716 |
Equity investments, at fair value (cost of $1,147 and $1,157, respectively) | 187 | 444 |
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively) | 10,662 | 10,662 |
Subordinated debt, at fair value | 59,601 | 50,928 |
Fair Value, Recurring [Member] | | |
Total, estimated fair value | 34,339 | 20,716 |
Equity investments, at fair value (cost of $1,147 and $1,157, respectively) | 187 | 444 |
Limited liability investments, at fair value | 18,180 | 32,811 |
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively) | 10,662 | 10,662 |
Total assets | 63,368 | 64,633 |
Subordinated debt, at fair value | 59,601 | 50,928 |
Stock-based compensation liabilities | 1,306 | 443 |
Derivative contract - interest rate swap | 65 | |
Total liabilities | 60,972 | 51,371 |
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) | 187 | 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 | 187 | 172 |
Subordinated debt, at fair value | 0 | 0 |
Stock-based compensation liabilities | 0 | 0 |
Derivative contract - interest rate swap | 0 | |
Total liabilities | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | |
Total, estimated fair value | 34,339 | 20,716 |
Equity investments, at fair value (cost of $1,147 and $1,157, respectively) | 0 | 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 | 34,339 | 20,988 |
Subordinated debt, at fair value | 59,601 | 50,928 |
Stock-based compensation liabilities | 0 | 0 |
Derivative contract - interest rate swap | 65 | |
Total liabilities | 59,666 | 50,928 |
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 | 3,744 | 3,263 |
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively) | 10,662 | 10,662 |
Total assets | 14,406 | 13,925 |
Subordinated debt, at fair value | 0 | 0 |
Stock-based compensation liabilities | 1,306 | 443 |
Derivative contract - interest rate swap | 0 | |
Total liabilities | 1,306 | 443 |
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 | 14,436 | 29,548 |
Real estate investments, at fair value (cost of $10,225 and $10,225, respectively) | 0 | 0 |
Total assets | 14,436 | 29,548 |
Subordinated debt, at fair value | 0 | 0 |
Stock-based compensation liabilities | 0 | 0 |
Derivative contract - interest rate swap | 0 | |
Total liabilities | 0 | 0 |
US Government Agencies Debt Securities [Member] | | |
Total, estimated fair value | 15,247 | 10,104 |
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Total, estimated fair value | 15,247 | 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 | 15,247 | 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 | 1,584 | 1,454 |
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Total, estimated fair value | 1,584 | 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 | 1,584 | 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 | 8,150 | 5,394 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | | |
Total, estimated fair value | 8,150 | 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 | 8,150 | 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 | 253 | |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | | |
Total, estimated fair value | 253 | |
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 | 253 | |
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 | 9,105 | 3,764 |
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | | |
Total, estimated fair value | 9,105 | 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 | 9,105 | 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) | 187 | 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) | 187 | 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) | 0 | 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) | 0 | 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 |