Regulatory and Clinical
Regulatory and clinical expenses were $551,494 for the year ended December 31, 2021 and $265,885 for the year ended December 31, 2020, an increase of $285,609, or 107.4%. The increase was primarily due to an increase in the hiring of additional employees of $212,427 as well as regulatory consulting expense increase of $50,720.
Quality Expenses
Quality expenses were $547,129 for the year ended December 31, 2021 and $149,199 for the year ended December 31, 2020, an increase of $397,930, or 266.7%. The increase was due to an increase in hiring of additional employees.
General and Administrative
General and administrative expenses were $4,643,473 for the year ended December 31, 2021 and $2,109,196 for the year ended December 31, 2020, an increase of $2,534,277, or 120.2%. The increase was primarily due to an insurance expense increase of $688,390, hiring of additional employees of $644,545, public company expense increase of $491,705, consulting expense increase of $257,309, office expense increase of $201,991, legal and accounting expense increase of $151,363 and other expense increase of $98,974. These increases can primarily be attributed to the cost of being a public company.
Interest Income
Interest income was $1,973 for the year ended December 31, 2021 and $8,733 for the year ended December 31, 2020, a decrease of $6,760, or 77.4%. The decrease was primarily due to lower interest rates on cash balances in 2021 compared to 2020.
Interest Expense
Interest expense was $613,882 for the year ended December 31, 2021 and $656,552 for the year ended December 31, 2020, a decrease of $42,670, or 6.5%. The decrease was primarily due to the interest expense on the Cheshire Note (as defined below) being lower in 2021 compared to 2020, as the note was converted to equity in June 2021.
Loss on Disposal of Property and Equipment
Loss on disposal of property and equipment was $5,459 for the year ended December 31, 2021 and $0 for the year ended December 31, 2020, an increase of $5,459, or 100.0%. The loss on disposal of property and equipment in 2021 related to the disposal of lab equipment no longer used.
Amortization of Discount on Note
Amortization expense related to the Cheshire Note was $62,638 for the year ended December 31, 2021 and $108,620 for the year ended December 31, 2020, a decrease of $45,982, or 42.3%. The decrease was due to the note being converted to equity in June 2021, and therefore there was less amortization expense related to the note in 2021 compared to 2020.
Change in Fair Value of Derivative
The change in fair value of the embedded derivative related to the Cheshire Note was $246,962 for the year ended December 31, 2021 and ($51,446) for the year ended December 31, 2020, a decrease of $298,408, or 580.0%. The decrease was due to the Cheshire Note being converted to equity in June 2021.