The Company’s portfolio of available-for-sale securities consists of high credit quality corporate debt securities. The following is a summary of the Company’s available-for-sale securities as of September 30, 2021 and December 31, 2020:

	September 30, 2021
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
	Cost		Gains		Losses		Amount)
Corporate debt securities		15,187,672		—		—		15,187,672
Total available-for-sale securities	$	15,187,672	$	—	$	—	$	15,187,672

	December 31, 2020
			Gross		Gross		Fair Value
	Amortized		Unrealized		Unrealized		(Net Carrying
	Cost		Gains		Losses		Amount)
Corporate debt securities		6,298,075		—		—		6,298,075
Total available-for-sale securities	$	6,298,075	$	—	$	—	$	6,298,075

There were no gross unrealized losses relating to the Company’s available-for-sale securities investments as of September 30, 2021. There were no net adjustments to unrealized gains (losses) on short-term investments, net of tax in other comprehensive income for the three and nine months ended September 30, 2021. The net adjustment to unrealized gains (losses) on short-term investments, net of tax in other comprehensive income totaled $(17,501) and $4,060 for the three and nine months ended September 30, 2020, respectively.

Contractual maturities of debt investment securities as of September 30, 2021 are shown below. Expected maturities may differ from contractual maturities where issuers of the securities have the right to prepay obligations without prepayment penalties.

	Under
	1 Year		1 to 2 Years		Total
Corporate debt securities		15,187,672		—		15,187,672
Total available-for-sale securities	$	15,187,672	$	—	$	15,187,672