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Note 8 - Notes Payable and Convertible Notes Payable (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Long-Term Debt Instruments [Table Text Block]
  

Stated

  

September 30,

  

December 31,

 

(in thousands, except interest rates)

 

Interest Rate

  

2024

  

2023

 

Notes payable

            

Advance Cecil, Inc. (commenced April 2019)

  8.00% $144  $138 

Maryland DHCD (commenced February 2019)

  8.00%  724   694 

Maryland DHCD (commenced May 2022)

  6.00%  1,083   1,083 

Avenue Venture Opportunities Fund, L.P. (commenced May 2021)

  15.10%  10,000   15,000 
       11,951   16,915 

Unamortized premium (discount) and debt issuance costs

      592   (394)

Less notes payable, current portion, net of unamortized discount and debt issuance costs

      (10,875)  (14,627)

Notes payable, net of current portion

     $1,668  $1,894 
             

Convertible notes payable

            

Avenue Venture Opportunities Fund, L.P. (commenced May 2021)

  15.10% $  $5,000 

Maryland DHCD (commenced December 2022)

  6.00%  5,312   5,308 
       5,312   10,308 

Unamortized discount and debt issuance costs

      (41)  (174)

Less convertible notes payable, current portion, net of unamortized discount and debt issuance costs

         (4,876)

Convertible notes payable, net of current portion

     $5,271  $5,258 
Schedule of Maturities of Long-Term Debt [Table Text Block]

(in thousands)

 

2019 MD Loan

  

2019 Cecil Loan

  

2021 Avenue Loan

  

2022 MD Loan

  

2022 DHCD Loan

 

2024 (remainder)

 $  $  $3,000  $  $ 

2025

        7,000   347    

2026

           369    

2027

           317    

2028

              5,000 

2029

               

Thereafter

  500   100          

Total debt principal payments

  500   100   10,000   1,033   5,000 

Accrued and unpaid interest

  224   44      50   312 

Unamortized premium (discount) and debt issuance costs

        608   (16)  (41)

Future debt payments, net

 $724  $144  $10,608  $1,067  $5,271