AddedResearch and Development Expense The following table presents the components of research and development (“R&D”) expense for the years ended December 31, 2023 and 2022: Year Ended December 31, (in thousands) 2023 2022 Variance Variance % Research and Development: Clinical and contract manufacturing $ 8,155 $ 8,326 $ (171) (2.1) % Personnel and related benefits 5,815 5,543 272 4.9 % Stock-based compensation 1,044 1,263 (219) (17.3) % Materials expense and tree planting 367 309 58 18.8 % Travel and other expenses 326 122 204 167.2 % Other 2,889 2,084 805 38.6 % Total $ 18,596 $ 17,647 $ 949 5.4 % The change in R&D expense of $949,000 for the year ended December 31, 2023 compared to 2022 was primarily due to: ● Clinical and contract manufacturing expenses decreased $171,000 from $8.3 million for the year ended December 31, 2022 to $8.2 million in 2023 largely due to lower clinical trial activities related to start-up of CTD and other indications, additional CMC manufacturing, consulting and contractors’ expenses, and cholera/lechlemer research expenses. ● Personnel and related benefits increased $272,000 from $5.5 million for the year ended December 31, 2022 to $5.8 million in 2023 largely due an increase in headcount. ● Stock-based compensation expense decreased $219,000 from $1.3 million for the year ended December 31, 2022 to $1.0 million in 2023 primarily due to lower options and RSUs granted during the period as compared to 2022. ● Travel, and other expenses increased by $204 ,000 from $122,000 for the year ended December 31, 2022 to $326,000 in 2023 primarily due to more travel activities associated with the clinical trials. ● Other expenses consisting of consulting, formulation and regulatory fees increased $805,000 from $2.1 million for the year ended December 31, 2022, to $2.9 million in 2023 mainly due to increased CTD activities. 77 Table of Contents Sales and Marketing Expense The following table presents the components of sales and marketing (“S&M”) expense for the years ended December 31, 2023 and 2022: Year Ended December 31, (in thousands) 2023 2022 Variance Variance % Sales and Marketing: Personnel and related benefits $ 3,025 $ 3,415 $ (390) (11.4) % Direct marketing fees and expense 1,903 3,596 (1,693) (47.1) % Stock-based compensation 152 267 (115) (43.1) % Other 1,380 1,559 (179) (11.5) % Total $ 6,460 $ 8,837 $ (2,377) (26.9) % The change in S&M expense of $2.4 million for the year ended December 31, 2023 compared to 2022 was primarily due to: ● Personnel and related benefits decreased $390,000 from $3.4 million for the year ended December 31, 2022 to $3.0 million in 2023 due to decreased sales commission and reduced headcount. ● Direct marketing fees and expense decreased $1.7 million from $3.6 million for the year ended December 31, 2022 to $1.9 million in 2023 due to savings associated with the utilization of a more cost-effective patient support services and other Mytesi marketing initiatives. ● Stock-based compensation benefits decreased $115,000 from $267,000 for the year ended December 31, 2022 to $152,000 in 2023 primarily due to lower options and RSUs granted during the period as compared to 2022. ● Other expenses decreased $179,000 from $1.6 million for the year ended December 31, 2022 to $1.4 million 2023 largely due to lower consulting and contractor services but slightly offset by increased travels for sales and marketing personnel. 78 Table of Contents General and Administrative Expense The following table presents the components of general and administrative (“G&A”) expense for the years ended December 31, 2023 and 2022: Year Ended December 31, (in thousands) 2023 2022 Variance Variance % General and Administrative: Personnel and related benefits $ 5,135 $ 5,582 $ (447) (8.0) % Legal services 2,009 1,225 784 64.0 % Public company expense 1,789 2,692 (903) (33.5) % Stock-based compensation 916 1,788 (872) (48.8) % Lease expense 877 629 248 39.4 % Third-party consulting services 679 507 172 33.9 % Audit, tax and accounting services 537 454 83 18.3 % Travel and other expenses 435 378 57 15.1 % Other 4,211 4,613 (402) (8.7) % Total $ 16,588 $ 17,868 $ (1,280) (7.2) % The change in G&A expenses of $1.3 million for the year ended December 31, 2023 compared to 2022 was due primarily to: ● Personnel and related benefits decreased $447,000 from $5.6 million for the year ended December 31, 2022 to $5.1 million in 2023 due to lower headcount and no bonus in 2023. ● Legal services increased $784,000 from $1.2 million for the year ended December 31, 2022 to $2.0 million in 2023 primarily due to increased legal consultations for contracts and agreements and other regulatory filings. ● Public company expenses decreased $903,000 from $2.7 million for the year ended December 31, 2022 to $1.8 million in 2023 due to less investor relations and communications consulting expenses, and decreased expenses related to the annual shareholder meetings. ● Stock-based compensation expense decreased $872,000 from $1.8 million for the year ended December 31, 2022 to $916,000 in 2023 primarily due to lower general and administrative expense incurred for options granted with immediate vesting to existing employees. ● Lease expense increased $248,000 from $629,000 for the year ended December 31, 2022 to $877,000 in 2023, primarily due to additional lease space and increase in fees. ● Third-party consulting services increased $172,000 from $507,000 for the year ended December 31, 2022 to $679,000 in 2023, mostly due to the increase in outsourced accounting transactions. ● Audit, tax and accounting services fees increased $83,000 from $454,000 for the year ended December 31, 2022 to $537,000 in 2023, mostly due to the additional financing and complex accounting transactions for the year. ● Other general and administrative expenses decreased $402,000 from $4.6 million for the year ended December 31, 2022 to $4.2 million in 2023 largely due to lower depreciation and amortization of fixed assets and intangible assets, insurance expenses and other support services. 79 Table of Contents Impairment Loss on Intangible Asset The Company recognized an impairment loss on intangible assets amounting to $371,000 as a result of impairment evaluation to its internal use software costs – registry triggered by experiencing lower-than-anticipated sales growth for Canalevia and Neonorm, its two primary animal health products.