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Note 6 - Fair Value (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

March 31, 2025

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 
  

(In thousands)

 

Debt investments

 $  $  $643,567  $643,567 

Warrant investments

     1,444   17,159   18,603 

Other investments

        13,697   13,697 

Equity investments

  712      12,974   13,686 

Total investments

 $712  $1,444  $687,397  $689,553 
  

December 31, 2024

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 
  

(In thousands)

 

Debt investments

 $  $  $638,779  $638,779 

Warrant investments

     1,839   16,438   18,277 

Other investments

        14,637   14,637 

Equity investments

  587      25,611   26,198 

Total investments

 $587  $1,839  $695,465  $697,891 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

March 31, 2025

 
  

Fair

 

Valuation Techniques/

 

Unobservable

   

Weighted

 

Investment Type

 

Value

 

Methodologies

 

Input

 

Range

 

Average(1)

 
     

(Dollars in thousands, except per share data)

      

Debt investments

 $628,070 

Discounted Expected Future Cash Flows

 

Hypothetical Market Yield

 

11% – 25%

  14%
              
   15,497 

Multiple Probability Weighted Cash Flow Model

 

Probability Weighting

 

5% - 100%

  60%
              

Warrant investments

  17,159 

Black-Scholes Valuation Model

 

Price Per Share

 

0.00 –807.91

 $16.09 
       

Average Industry Volatility

 

24%

  24%
       

Marketability Discount

 

0 - 20%

  19%
       

Estimated Time to Exit (in years)

 1 to 5  3 
              

Other investments

  13,697 

Multiple Probability Weighted Cash Flow Model

 

Discount Rate

 

15% – 25%

  18%
       

Probability Weighting

 

25% – 100%

  90%
              

Equity investments

  11,693 

Last Equity Financing

 

Price Per Share

 

0.06215.03

 $54.28 
              
   1,281 

Multiple Probability Weighted Scenario Model

 

Probability Weighting

 

20% – 100%

  33%
              

Total Level 3 investments

 $687,397          

December 31, 2024

 
  

Fair

 

Valuation Techniques/

 

Unobservable

   

Weighted

 

Investment Type

 

Value

 

Methodologies

 

Input

 

Range

 

Average(1)

 
     

(Dollars in thousands, except per share data)

      

Debt investments

 $628,325 

Discounted Expected Future Cash Flows

 

Hypothetical Market Yield

 11% – 20%  14%
              
   10,454 

Multiple Probability Weighted Cash Flow Model

 

Probability Weighting

 10% - 100%  57%
              

Warrant investments

  16,438 

Black-Scholes Valuation Model

 

Price Per Share

 

0.00 –807.91

 $16.80 
       

Average Industry Volatility

 24%  24%
       

Marketability Discount

 0 - 20%  15%
       

Estimated Time to Exit (in years)

 1 to 5  3 
              

Other investments

  14,637 

Multiple Probability Weighted Cash Flow Model

 

Discount Rate

 15%25%  18%
      

Probability Weighting

 30%100%  90%
              

Equity investments

  21,648 

Last Equity Financing

 

Price Per Share

 

0.06215.03

 $30.47 
              
   3,963 

Multiple Probability Weighted Scenario Model

 

Probability Weighting

 10% – 100%  33%
              

Total Level 3 investments

 $695,465          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Three months ended March 31, 2025

 
  

Debt

  

Warrant

  

Equity

  

Other

     
  

Investments

  

Investments

  

Investments

  

Investments

  

Total

 
  

(In thousands)

 

Level 3 assets, beginning of period

 $638,779  $16,438  $25,611  $14,637  $695,465 

Purchase of investments

  71,629      2,045   15   73,689 

Warrants received and classified as Level 3

     165         165 

Principal payments received on investments

  (50,745)           (50,745)

PIK interest on investments

  285            285 

Proceeds from sale of investments

  (1)           (1)

Net realized gain on investments

  1            1 

Unrealized (depreciation) appreciation included in earnings

  (16,806)  556   (14,682)  (955)  (31,887)

Other

  425            425 

Level 3 assets, end of period

 $643,567  $17,159  $12,974  $13,697  $687,397 
  

Three months ended March 31, 2024

 
  

Debt

  

Warrant

  

Equity

  

Other

     
  

Investments

  

Investments

  

Investments

  

Investments

  

Total

 
  

(In thousands)

 

Level 3 assets, beginning of period

 $670,172  $22,975  $7,281  $6,430  $706,858 

Purchase of investments

  22,177      750   392   23,319 

Warrants received and classified as Level 3

     128         128 

Principal payments received on investments

  (19,080)        (563)  (19,643)

PIK interest on investments

  1,382            1,382 

Proceeds from sale of investments

  (41)           (41)

Net realized gain (loss) on investments

  38   (17)        21 

Unrealized (depreciation) appreciation included in earnings

  (1,509)  70   (1,206)  (258)  (2,903)

Transfer out of debt investments

  (3,191)        3,191    

Other

  825            825 

Level 3 assets, end of period

 $670,773  $23,156  $6,825  $9,192  $709,946