Regulatory and Clinical
Regulatory and clinical expenses were $803,763 for the six months ended June 30, 2023 and $774,632 for the six months ended June 30, 2022, an increase of $29,131, or 3.8%. The increase was primarily due to a headcount increase which resulted in an increase in payroll expense of $85,199, partially offset by consulting expense decrease of $30,940, office expense decrease of $7,951, contract services expense decrease of $7,658, travel and entertainment expense decrease of $6,087 and other expense decrease of $3,432.
Quality
Quality expenses were $1,098,917 for the six months ended June 30, 2023 and $958,268 for the six months ended June 30, 2022, an increase of $140,649, or 14.7%. The increase was primarily due to an increase in lab supply expense of $341,972 and other expense increase of $22,982. The increase was partially offset by a decrease in payroll expense of $143,708, consulting expense decrease of $70,882, contract services expense decrease of $7,652 and office expense decrease of $2,063.
General and Administrative
General and administrative expenses were $4,637,917 for the six months ended June 30, 2023 and $4,461,017 for the six months ended June 30, 2022, an increase of $176,900, or 4.0%. The increase was primarily due to deferred offering costs write-off of $221,254, payroll expense increase of $122,278, shareholder expense increase of $7,420 and professional service expense increase of $3,551. The increase was partially offset by travel and entertainment expense decrease of $59,875, office expense decrease of $45,842, insurance expense decrease of $34,059, consulting expense decrease of $31,604 and other expense decrease of $6,223.
Interest Income
Interest income was $268,139 for the six months ended June 30, 2023 and $61,848 for the six months ended June 30, 2022, an increase of $206,291, or 333.5%. The increase was primarily due to U.S. Treasury securities purchased during the second quarter of 2022 and the second quarter of 2023 with cash received from our initial public offering and our secondary public offering, which was completed in the first quarter of 2023.
Interest Expense
Interest expense was $18,413 for the six months ended June 30, 2023 and $19,690 for the six months ended June 30, 2022, a decrease of $1,277, or 6.5%.
Employee Retention Credit
Employee retention credit income was $527,143 for the six months ended June 30, 2023. This is a refundable credit against certain employment taxes recognized under the provisions of the Coronavirus Aid, Relief, and Economic Security Act.
Liquidity and Capital Resources
We have incurred net losses since our inception. For the three months ended June 30, 2023 and 2022, we incurred net losses of $6,530,420 and $8,182,189, respectively. For the six months ended June 30, 2023 and 2022, we incurred net losses of $14,010,572 and $15,385,938, respectively. As of June 30, 2023, we had an accumulated deficit of $118,022,483.