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Note 6 - Fair Value (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
  

March 31, 2024

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 
  

(In thousands)

 

Debt investments

 $  $  $670,773  $670,773 

Warrant investments

     772   23,156   23,928 

Other investments

        9,192   9,192 

Equity investments

  398      6,825   7,223 

Total investments

 $398  $772  $709,946  $711,116 
  

December 31, 2023

 
  

Level 1

  

Level 2

  

Level 3

  

Total

 
  

(In thousands)

 

Debt investments

 $  $  $670,172  $670,172 

Warrant investments

     1,619   22,975   24,594 

Other investments

        6,430   6,430 

Equity investments

  608      7,281   7,889 

Total investments

 $608  $1,619  $706,858  $709,085 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

March 31, 2024

 
  

Fair

 

Valuation Techniques/

 

Unobservable

   

Weighted

 

Investment Type

 

Value

 

Methodologies

 

Input

 

Range

 

Average(1)

 
     

(Dollars in thousands, except per share data)

      

Debt investments

 $619,773 

Discounted Expected Future Cash Flows

 

Hypothetical Market Yield

 

11% – 20%

  15%
              
   51,000 

Multiple Probability Weighted Cash Flow Model

 

Probability Weighting

 

5% - 95%

  44%
              

Warrant investments

  23,094 

Black-Scholes Valuation Model

 

Price Per Share

 

0.000 –1,898.58

 $61.04 
       

Average Industry Volatility

 

25%

  25%
       

Marketability Discount

 

0 - 20%

  18%
       

Estimated Time to Exit (in years)

 1 to 5  3 
   62 

Expected Proceeds

 

Price Per Share

 $0.25 $0.25 
              

Other investments

  9,192 

Multiple Probability Weighted Cash Flow Model

 

Discount Rate

 

25%

  25%
       

Probability Weighting

 

30% – 100%

  75%
              

Equity investments

  6,825 

Last Equity Financing

 

Price Per Share

 

0.000 –215.03

 $18.21 
              

Total Level 3 investments

 $709,946          

December 31, 2023

 
  

Fair

 

Valuation Techniques/

 

Unobservable

   

Weighted

 

Investment Type

 

Value

 

Methodologies

 

Input

 

Range

 

Average(1)

 
     

(Dollars in thousands, except per share data)

      

Debt investments

 $617,529 

Discounted Expected Future Cash Flows

 

Hypothetical Market Yield

 11% – 24%  15%
              
   52,643 

Multiple Probability Weighted Cash Flow Model

 

Probability Weighting

 20% - 100%  50%
              

Warrant investments

  22,913 

Black-Scholes Valuation Model

 

Price Per Share

 

0.000 –1,899

 $64.95 
       

Average Industry Volatility

 25%  25%
       

Marketability Discount

 0 - 20%  18%
       

Estimated Time to Exit (in years)

 1 to 5  3 
   62 

Expected Proceeds

 

Price Per Share

 $0.25 $0.25 
              

Other investments

  6,430 

Multiple Probability Weighted Cash Flow Model

 

Discount Rate

 25%  25%
       

Probability Weighting

 30% – 100%  81%
              

Equity investments

  7,281 

Last Equity Financing

 

Price Per Share

 

0.566 –215.03

 $17.15 
              

Total Level 3 investments

 $706,858          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

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)

Payment-in-kind 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 
  

Three months ended March 31, 2023

 
  

Debt

  

Warrant

  

Equity

  

Other

     
  

Investments

  

Investments

  

Investments

  

Investments

  

Total

 
  

(In thousands)

 

Level 3 assets, beginning of period

 $686,458  $26,145  $2,416  $1,300  $716,319 

Purchase of investments

  46,998      10      47,008 

Warrants received and classified as Level 3

     141         141 

Principal payments received on investments

  (39,756)           (39,756)

Payment-in-kind interest on investments

  1,204            1,204 

Proceeds from sale of investments

  (6,508)  (12)        (6,520)

Net realized gain (loss) on investments

  7   (141)        (134)

Unrealized (depreciation) appreciation included in earnings

  (4,566)  (1,490)  189      (5,867)

Transfer out of debt investments

  (295)  (5)  300       

Other

  1,012            1,012 

Level 3 assets, end of period

 $684,554  $24,638  $2,915  $1,300  $713,407