Note 4 – Cash, Cash Equivalents, Restricted Cash and Marketable Securities

The Company considers all highly liquid financial instruments with original maturities of three months or less when purchased to be cash and cash equivalents and all investments with maturities of greater than three months from date of purchase are classified as marketable securities. Cash and cash equivalents consisted of cash in bank checking and savings accounts, money market funds and short-term U.S. treasury bonds that mature within three months of settlement date.

Cash, Cash Equivalents and Restricted Cash

The Company presents restricted cash with cash and cash equivalents in the Condensed Consolidated Statements of Cash Flows. Restricted cash represents funds the Company is required to set aside to cover building operating leases and other purposes.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in the Condensed Consolidated Balance Sheets to the total of the amounts in the Condensed Consolidated Statements of Cash Flows as of September 30, 2021, December 31, 2020, September 30, 2020 and December 31, 2019:

 Schedule of Cash, Cash Equivalents and Restricted Cash

Marketable Securities

The Company has classified its investments in marketable securities as available-for-sale and as a current asset. The Company’s investments in marketable securities are carried at fair value, with unrealized gains and losses included as a separate component of stockholders’ equity. Unrealized losses and gains are classified as other comprehensive (loss)/income and costs are determined on a specific identification basis. Realized gains and losses from our marketable securities are recorded in other income, net. For the three and nine months ended September 30, 2021, the Company recorded unrealized losses of approximately $53 thousand and $230 thousand, respectively. For the three and nine months ended September 30, 2020, the Company recorded unrealized loss of approximately $114 thousand and unrealized gains of approximately $367 thousand, respectively. As of September 30, 2021 and December 31, 2020, the Company had net accumulated unrealized (loss)/gains of approximately ($2) thousand and $228 thousand, respectively.

The following tables summarizes the Company’s marketable securities as of September 30, 2021:

 Summary of Marketable Securities

Maturities of debt securities classified as available-for-sale were as follows at September 30, 2021:

 Schedule of Maturities of Debt Securities Available-for-sale

The following tables summarizes the Company’s marketable securities for the year ended December 31, 2020 consisted of the following:

Maturities of debt securities classified as available-for-sale were as follows at December 31, 2020: