Note 8 - Fair Value Disclosures - Fair Value Measurements on a Recurring Basis (Details) - USD ($) | Sep. 30, 2020 | Dec. 31, 2019 |
Investments-trading | $ 237,271,000 | | $ 307,852,000 | |
Other Investments, at fair value | 22,452,000 | | 14,864,000 | |
Trading securities sold, not yet purchased | 54,619,000 | | 77,947,000 | |
Corporate Bonds and Redeemable Preferred Stock [Member] | | | | |
Investments-trading | 28,375,000 | | 38,503,000 | |
Trading securities sold, not yet purchased | 33,941,000 | | 58,083,000 | |
Foreign Government Bonds [Member] | | | | |
Investments-trading | 681,000 | | 844,000 | |
Municipal Bonds [Member] | | | | |
Investments-trading | 3,271,000 | | 13,737,000 | |
Trading securities sold, not yet purchased | 20,000 | | 20,000 | |
Certificates of Deposit [Member] | | | | |
Investments-trading | 812,000 | | 841,000 | |
Derivative [Member] | | | | |
Investments-trading | 6,172,000 | | 3,686,000 | |
Trading securities sold, not yet purchased | 5,227,000 | | 3,017,000 | |
Equity Securities [Member] | | | | |
Investments-trading | 267,000 | | 561,000 | |
Other Investments, at fair value | 17,051,000 | | 9,352,000 | |
Trading securities sold, not yet purchased | 2,255,000 | | | |
Residential Transition Loans [Member] | | | | |
Investments-trading | 237,271,000 | | 307,852,000 | |
Other Investments, at fair value | 2,266,000 | | | |
Fair Value, Recurring [Member] | | | | |
Investments-trading | 237,271,000 | | 307,852,000 | |
Other Investments, at fair value | 22,452 | | 14,864,000 | |
Trading securities sold, not yet purchased | 54,619 | | 77,947,000 | |
Fair Value, Recurring [Member] | Corporate Bonds and Redeemable Preferred Stock [Member] | | | | |
Investments-trading | 28,375,000 | | 38,503,000 | |
Trading securities sold, not yet purchased | 33,941 | | 58,083,000 | |
Fair Value, Recurring [Member] | Foreign Government Bonds [Member] | | | | |
Investments-trading | 681,000 | | 844,000 | |
Fair Value, Recurring [Member] | Municipal Bonds [Member] | | | | |
Investments-trading | 3,271,000 | | 13,737,000 | |
Trading securities sold, not yet purchased | 20,000 | | 20,000 | |
Fair Value, Recurring [Member] | Certificates of Deposit [Member] | | | | |
Investments-trading | 812,000 | | 841,000 | |
Fair Value, Recurring [Member] | Derivative [Member] | | | | |
Investments-trading | 6,172,000 | | 3,686,000 | |
Trading securities sold, not yet purchased | 5,227,000 | | 3,017,000 | |
Fair Value, Recurring [Member] | Equity Securities [Member] | | | | |
Investments-trading | 267,000 | | 561,000 | |
Other Investments, at fair value | 17,051,000 | | 9,352,000 | |
Trading securities sold, not yet purchased | 2,255,000 | | | |
Fair Value, Recurring [Member] | Residential Transition Loans [Member] | | | | |
Other Investments, at fair value | 2,266,000 | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | 9,917,000 | | 11,105,000 | |
Trading securities sold, not yet purchased | 13,172 | | 16,827,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Bonds and Redeemable Preferred Stock [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Government Bonds [Member] | | | | |
Investments-trading | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal Bonds [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member] | | | | |
Investments-trading | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Derivative [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] | | | | |
Investments-trading | | | | |
Other Investments, at fair value | 12,424,000 | | 2,009,000 | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Transition Loans [Member] | | | | |
Other Investments, at fair value | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | 227,354,000 | | 296,747,000 | |
Trading securities sold, not yet purchased | 41,447 | | 61,120,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Bonds and Redeemable Preferred Stock [Member] | | | | |
Investments-trading | 28,375,000 | | 38,503,000 | |
Trading securities sold, not yet purchased | 33,941 | | 58,083,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Government Bonds [Member] | | | | |
Investments-trading | 681,000 | | 844,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member] | | | | |
Investments-trading | 3,271,000 | | 13,737,000 | |
Trading securities sold, not yet purchased | 20,000 | | 20,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member] | | | | |
Investments-trading | 812,000 | | 841,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Derivative [Member] | | | | |
Investments-trading | 6,172,000 | | 3,686,000 | |
Trading securities sold, not yet purchased | 5,227,000 | | 3,017,000 | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member] | | | | |
Investments-trading | 267,000 | | 561,000 | |
Other Investments, at fair value | 4,627,000 | | 7,343,000 | |
Trading securities sold, not yet purchased | 2,255,000 | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Transition Loans [Member] | | | | |
Other Investments, at fair value | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Bonds and Redeemable Preferred Stock [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Government Bonds [Member] | | | | |
Investments-trading | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal Bonds [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member] | | | | |
Investments-trading | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] | | | | |
Investments-trading | | | | |
Other Investments, at fair value | | | | |
Trading securities sold, not yet purchased | | | | |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Transition Loans [Member] | | | | |
Other Investments, at fair value | 2,266,000 | | | |
Fair Value, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | | | | |
Other Investments, at fair value | 2,136 | | 2,891,000 | [1] |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | | | | |
Investments-trading | 172,865,000 | | 196,146,000 | |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | | | | |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | 172,865,000 | | 196,146,000 | |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
US Government Agencies Debt Securities [Member] | | | | |
Trading securities sold, not yet purchased | 4,000 | | | |
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | | | | |
Investments-trading | 4,791,000 | | 14,680,000 | |
Trading securities sold, not yet purchased | 4,000 | | | |
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | 4,791,000 | | 14,680,000 | |
Trading securities sold, not yet purchased | 4,000 | | | |
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | | | | |
Investments-trading | 15,000 | | 15,000 | |
Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | | | | |
Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | 15,000 | | 15,000 | |
Residential Mortgage Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
US Treasury Securities [Member] | | | | |
Trading securities sold, not yet purchased | 13,172,000 | | 16,827,000 | |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | | | | |
Investments-trading | 9,917,000 | | 11,105,000 | |
Trading securities sold, not yet purchased | 13,172,000 | | 16,827,000 | |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | 9,917,000 | | 11,105,000 | |
Trading securities sold, not yet purchased | 13,172,000 | | 16,827,000 | |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
US Treasury Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
Trading securities sold, not yet purchased | | | | |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | | | | |
Investments-trading | 1,000 | | 100,000 | |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | | | | |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | 1,000 | | 100,000 | |
Asset-backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
Small Business Administration Loans [Member] | Fair Value, Recurring [Member] | | | | |
Investments-trading | 10,104,000 | | 27,634,000 | |
Small Business Administration Loans [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Investments-trading | | | | |
Small Business Administration Loans [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Investments-trading | 10,104,000 | | 27,634,000 | |
Small Business Administration Loans [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Investments-trading | | | | |
Collateralized Loan Obligations [Member] | | | | |
Other Investments, at fair value | | | 2,522,000 | |
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] | | | | |
Other Investments, at fair value | | | 2,522,000 | |
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Other Investments, at fair value | | | | |
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Other Investments, at fair value | | | | |
Collateralized Loan Obligations [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Other Investments, at fair value | | | 2,522,000 | |
Subordinated Notes [Member] | | | | |
Other Investments, at fair value | 900,000 | | | |
Subordinated Notes [Member] | Fair Value, Recurring [Member] | | | | |
Other Investments, at fair value | 900,000 | | | |
Subordinated Notes [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Other Investments, at fair value | | | | |
Subordinated Notes [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Other Investments, at fair value | 900,000 | | | |
Subordinated Notes [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Other Investments, at fair value | | | | |
Residential Mortgage [Member] | | | | |
Other Investments, at fair value | 99,000 | | 99,000 | |
Residential Mortgage [Member] | Fair Value, Recurring [Member] | | | | |
Other Investments, at fair value | 99,000 | [2] | 99,000 | |
Residential Mortgage [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Other Investments, at fair value | | [2] | | |
Residential Mortgage [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Other Investments, at fair value | 99,000 | [2] | 99,000 | |
Residential Mortgage [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Other Investments, at fair value | | [2] | | |
Total Investments not Measured at NAV [Member] | Fair Value, Recurring [Member] | | | | |
Other Investments, at fair value | 20,316,000 | | 11,973,000 | |
Total Investments not Measured at NAV [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | | |
Other Investments, at fair value | 12,424,000 | | 2,009,000 | |
Total Investments not Measured at NAV [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | | |
Other Investments, at fair value | 5,626,000 | | 7,442,000 | |
Total Investments not Measured at NAV [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | | |
Other Investments, at fair value | $ 2,266,000 | | $ 2,522,000 | |
|
[1] | As a practical expedient, the Company uses NAV per share (or its equivalent) to measure the fair value of its investments in the U.S. Insurance JV and the SPAC Fund. The U.S. Insurance JV invests in USD denominated debt issued by small and medium size insurance and reinsurance companies. The SPAC Fund invests in equity securities of SPACs. According to ASC 820, these investments are not categorized within the valuation hierarchy. |
[2] | As a practical expedient, the Company uses NAV per share (or its equivalent) to measure the fair value of its investments in the U.S. Insurance JV and the SPAC Fund. The U.S. Insurance JV invests in USD denominated debt issued by small insurance and reinsurance companies. The SPAC Fund invests in equity securities of SPACs. According to ASC 820, these investments are not categorized within the valuation hierarchy. |