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Cash, Cash Equivalents and Investments | 3 Months Ended
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Mar. 31, 2022
Cash and Cash Equivalents [Abstract] |
Cash, Cash Equivalents and Investments | CASH, CASH EQUIVALENTS AND INVESTMENTS Securities classified as cash, cash equivalents and investments as of March 31, 2022 and December 31, 2021 are summarized below (in thousands):
| March 31, 2022
|  |  | Gross Unrealized |  |
| Amortized Cost |  | Gains |  | Losses |  | Fair Value
Cash and cash equivalents: |  |  |  |  |  |  |
Cash | $ | 7,555 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,555 |
Money market funds | 34,524 |  |  | — |  |  | — |  |  | 34,524 |
Commercial paper | 4,999 |  |  | — |  |  | (1) |  |  | 4,998 |
Total cash and cash equivalents | 47,078 |  |  | — |  |  | (1) |  |  | 47,077 |
Short-term investments: |  |  |  |  |  |  |
Commercial paper | $ | 28,409 |  |  | $ | — |  |  | $ | (52) |  |  | $ | 28,357 |
U.S. government-sponsored agency bonds | 10,777 |  |  | — |  |  | (22) |  |  | 10,755 |
Corporate bonds | 2,521 |  |  | — |  |  | (10) |  |  | 2,511 |
Asset-backed securities | 1,007 |  |  | — |  |  | (3) |  |  | 1,004 |
Total short-term investments | 42,714 |  |  | — |  |  | (87) |  |  | 42,627 |
Total cash equivalents and investments | $ | 89,792 |  |  | $ | — |  |  | $ | (88) |  |  | $ | 89,704 |
| December 31, 2021
|  |  | Gross Unrealized |  |
| Amortized Cost |  | Gains |  | Losses |  | Fair Value
Cash and cash equivalents: |  |  |  |  |  |  |
Cash | $ | 1,253 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,253 |
Money market funds | 71,175 |  |  | — |  |  | — |  |  | 71,175 |
Total cash and cash equivalents | 72,428 |  |  | — |  |  | — |  |  | 72,428 |
Short-term investments |  |  |  |  |  |  |
Commercial paper | $ | 31,936 |  |  | $ | 1 |  |  | $ | (2) |  |  | $ | 31,935 |
Corporate bonds | 7,025 |  |  | — |  |  | (3) |  |  | 7,022 |
Asset backed securities | 5,306 |  |  | — |  |  | (2) |  |  | 5,304 |
Total short-term investments | 44,267 |  |  | 1 |  |  | (7) |  |  | 44,261 |
Total cash equivalents and investments | $ | 116,695 |  |  | $ | 1 |  |  | $ | (7) |  |  | $ | 116,689 |
Cash equivalents consist of money market funds and other debt securities with original maturities of three months or less at the time of purchase, and the carrying amount is a reasonable approximation of fair value. We invest our cash in high quality securities of financial and commercial institutions. These securities are carried at fair value, which is based on readily available market information, with unrealized gains and losses included in accumulated other comprehensive income (loss) within stockholders’ equity on our balance sheets. We use the specific identification method to determine the amount of realized gains or losses on sales of marketable securities. Realized gains or losses have been insignificant and are included in other income (expense), net, in the statement of operations and comprehensive loss. All short-term available-for-sale securities held as of March 31, 2022 had contractual maturities of less than one year. Our available-for-sale securities are subject to a periodic impairment review. We consider a debt security to be impaired when its fair value is less than its carrying cost, in which case we would further review the investment to determine whether it is other-than-temporarily impaired. When we evaluate an investment for other-than-temporary impairment, we review factors such as the length of time and extent to which fair value has been below cost basis, the financial condition of the issuer and any changes thereto, intent to sell, and whether it is more likely than not we will be required to sell the investment before the recovery of its cost basis. If an investment is other-than-temporarily impaired, we write it down through the statement of operations and comprehensive loss to its fair value and establishes that value as a new cost basis for the investment. We did not identify any of our available-for-sale securities as other-than-temporarily impaired in any of the periods presented. As of March 31, 2022 no investment was in a continuous unrealized loss position for more than one year and we believe that it is more likely than not that the investments will be held until maturity or a forecasted recovery of fair value.

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- Definition The entire disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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