Note 7. Letter of Credit

The Company has a letter of credit with a bank for an aggregate available amount of $50,000 due upon demand. The letter of credit is collateralized by substantially all of the Company’s assets and personally guaranteed by Dr. Jonathan Kaufman, the Company’s Chief Executive Officer. The outstanding advances under the line of credit bear interest at the lending bank’s prime rate plus 3.10%. The outstanding balance was $0 at September 30, 2025 and December 31, 2024. The letter of credit has been paid in full since February 2023.