On April 7, 2020, the Company applied for a loan from ServisFirst Bank, as lender, pursuant to the Paycheck Protection Program of the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) as administered by the U.S. Small Business Administration (the "SBA"). On April 13, 2020, the Loan was approved and the Company received the proceeds from a loan in the amount of $632,000 (the “PPP Loan”).

The PPP Loan, which took the form of a promissory note (the “Promissory Note”), was set to mature on April 7, 2022 and bore interest at a rate of 1% per annum. Monthly principal and interest payments, less the amount of any potential forgiveness (discussed below), was to commence on November 7, 2020. The Promissory Note provided for customary events of default, including, among others, those relating to failure to make payment, bankruptcy, breaches of representations and material adverse effects. The Company could prepay the principal of the PPP Loan at any time without incurring any prepayment charges.

All or a portion of the Loan may be forgiven by the SBA and lender upon application by the Company upon documentation of expenditures in accordance with the SBA requirements. On July 21, 2020, the Company voluntarily extinguished the Promissory Note by paying the outstanding principal and accrued interest in cash.

	December 31,
	2020		2019
Lease obligation, long-term portion (see Note 6)	$	1,468,124	$	1,484,679
Conditional economic incentive grants		250,000		250,000
Other		110,319		130,196
Total other long-term liabilities	$	1,828,443	$	1,864,875

The Company had two non-interest-bearing research and development funding arrangements with BPI France that were entered into in December 2013 to provide up to €750,000 in research funding in the first arrangement and up to €250,000 in the second arrangement. The Company was permitted to draw 50% of the funds upon the signing of the arrangements, an additional 30% contingent upon a financial audit and technical progress report, and the remaining amounts at the completion of the research and development project being funded by the arrangements. In October 2016, the Company and BPI France agreed to extend the term on the arrangement by two years. The total amount advanced under the arrangements was €500,000. In April 2019, the Company was notified that €102,951 exceeded the allowable funding in accordance with the arrangement and made payment of this amount on June 5, 2019. In September 2019, the Company was notified that €238,229 ($265,540) was converted into a grant and recognized as grant revenue for the year ended December 31, 2019. In October 2019, the Company paid the remaining balance on the BPI France notes. The total repayments during the year ended December 31, 2019 was $292,002.

The Company has two conditional economic incentive grants for a total of $250,000 from Montgomery County, Maryland and the State of Maryland. The Montgomery County grant was received in May of 2018, with a term expiring on February 28, 2028. The State of Maryland grant was received in October 2019, with a 10-year term expiring on December 31, 2029. These grants are conditional primarily based on the Company maintaining its current headquarter locations in addition to employing a required number of employees at different reporting dates through the term of the grant. The Company is accruing 3% interest on both grants and has recorded $12,625 and $5,042 in interest expense for the years ended December 31, 2020 and 2019, respectively.