In November 2017, the Company entered into a loan agreement with a financing company for $415,265 to finance one of the Company’s insurance policies. The terms of the loan stipulate equal monthly payments of principal and interest payments of $41,975 over a ten-month period. Interest accrued on this loan at an annual rate of 2.35%. This loan was fully repaid in August 2018.

In November 2018, the Company entered into a loan agreement with a financing company for $491,629 to finance one of the Company’s insurance policies. The terms of the loan stipulate equal monthly payments of principal and interest payments of $49,857 over a ten-month period. Interest accrues on this loan at an annual rate of 3.07%. Prepaid expenses as of June 30, 2019 and December 31, 2018, included $170,625 and $441,875, respectively, related to this insurance policy.

Interest expense for notes payable for the three months ended June 30, 2019 and 2018 totaled $1,521 and $904, respectively. Interest expense for notes payable for the six months ended June 30, 2019 and 2018 totaled $3,366 and $2,564, respectively.