NOTE 5. MARKETABLE SECURITIES | NOTE 5. MARKETABLE SECURITIES The following table shows the major categories of our marketable securities and their contractual maturities as of December 31, 2024: Total <1 Year 1–3 Years 3–5 Years Money market funds $ 5,109,218 $ 5,109,218 $ - $ - Treasury securities 4,686,781 - 4,686,781 - Corporate bonds 39,924,838 14,907,252 17,149,882 7,867,704 Total $ 49,720,837 $ 20,016,470 $ 21,836,663 $ 7,867,704 Total marketable securities and money market funds represented approximately 77% of our total assets as of December 31, 2024. Marketable securities as of December 31, 2024, had remaining maturities between 10 weeks and 52 months. Money market funds are included on the balance sheets in “Cash and cash equivalents.” Corporate bonds are included in “Marketable securities, short term” and “Marketable securities, long term.” Treasury securities are included in “Marketable securities, long term.” Accrued interest receivable was $354,529 as of December 31, 2024, and $460,627 as of March 31, 2024, and is included in the balance sheets in “Prepaid expenses and other assets.” We monitor the credit ratings of our marketable securities at least quarterly as reported by Standard & Poor’s. The following table summarizes the fair values of our marketable securities as of December 31, 2024, aggregated by credit rating: Credit Rating Fair Value AAA $ 9,795,999 AA+ 3,877,878 AA 9,755,138 AA- 18,408,078 A+ 2,915,398 A 4,968,346 Total $ 49,720,837 Because we believe it is more likely than not we will recover the cost basis of our investments, we did not record any allowance attributable to credit losses. None of the marketable securities purchased during the period had experienced more-than-insignificant deterioration in credit quality since its origination and were therefore not considered “Purchased Financial Assets with Credit Deterioration.” The following table shows the estimated fair value of our marketable securities, aggregated by fair value hierarchy inputs used in estimating their fair values: As of December 31, 2024 As of March 31, 2024 Level 1 Level 2 Total Level 1 Level 2 Total Money market funds $ 5,109,218 $ - $ 5,109,218 $ 9,842,796 $ - $ 9,842,796 Treasury securities - 4,686,781 4,686,781 - - - Corporate bonds - 39,924,838 39,924,838 - 42,706,080 42,706,080 Total $ 5,109,218 $ 44,611,619 $ 49,720,837 $ 9,842,796 $ 42,706,080 $ 52,548,876 The following table shows the amortized cost, fair value and gross unrealized holding gains and losses of our marketable securities as of December 31 and March 31, 2024: As of December 31, 2024 As of March 31, 2024 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Estimated Fair Value Money market funds $ 5,109,218 $ - $ - $ 5,109,218 $ 9,842,796 $ - $ - $ 9,842,796 Treasury securities 4,699,645 - (12,864 ) 4,686,781 - - - - Corporate bonds 40,289,749 40,688 (405,599 ) 39,924,838 43,701,520 930 (996,370 ) 42,706,080 Total $ 50,098,612 $ 40,688 $ (418,463 ) $ 49,720,837 $ 53,544,316 $ 930 $ (996,370 ) $ 52,548,876 The following table shows the gross unrealized holding losses and estimated fair value of our marketable securities, aggregated by category of securities and length of time that individual securities had been in a continuous unrealized loss position as of December 31 and March 31, 2024. Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Gross Unrealized Holding Losses Estimated Fair Value Gross Unrealized Holding Losses Estimated Fair Value Gross Unrealized Holding Losses As of December 31, 2024 Treasury securities $ 4,686,781 $ (12,864 ) $ - $ - 4,686,781 (12,864 ) Corporate bonds 7,364,614 (97,789 ) 25,812,127 (307,810 ) $ 33,176,741 $ (405,599 ) Total $ 12,051,395 $ (110,653 ) $ 25,812,127 $ (307,810 ) $ 37,863,522 $ (418,463 ) As of March 31, 2024 Corporate bonds $ 3,154,764 $ (4,902 ) $ 36,551,534 $ (991,468 ) $ 39,706,298 $ (996,370 ) Total $ 3,154,764 $ (4,902 ) $ 36,551,534 $ (991,468 ) $ 39,706,298 $ (996,370 ) None of the securities were impaired at acquisition, and subsequent declines in fair value are attributable to interest rate increases. We do not intend to sell, and it is not more likely than not that we will be required to sell, these securities before recovery of their amortized cost basis. The issuers continue to make timely interest payments on these securities. Unrealized gains and losses on our marketable securities and their tax effects are as follows: Quarter Ended December 31, 2024 2023 Unrealized gain (loss) on marketable securities $ (290,384 ) $ 958,564 Tax effects 63,536 (209,734 ) Unrealized gain (loss) on marketable securities, net of tax $ (226,848 ) $ 748,830 Nine Months Ended December 31, 2024 2023 Unrealized gain from marketable securities $ 617,665 $ 589,530 Tax effects (135,386 ) (128,989 ) Unrealized gain on marketable securities, net of tax $ 482,279 $ 460,541 |