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CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS | 6 Months Ended
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Jun. 30, 2024
CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS |
CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS | 8.Cash, Cash Equivalents and Short-Term Investments Cash, cash equivalents and short-term investments for the periods presented consist of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of
​ | ​ | June 30, 2024 |  | December 31, 2023
Cash | ​ | $ | 6,126 | ​ | $ | 8,247
Money market funds | ​ |  | 13,805 | ​ |  | 9,685
US treasury bills | ​ |  | 4,963 | ​ |  | 12,594
Government-sponsored enterprise securities | ​ |  | 10,444 | ​ |  | 11,233
Corporate bonds and commercial paper | ​ |  | 13,764 | ​ |  | 15,174
​ | ​ | $ | 49,102 | ​ | $ | 56,933
Reported as: | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents | ​ | $ | 36,053 | ​ | $ | 32,786
Short-term investments | ​ |  | 13,049 | ​ |  | 24,147
​ | ​ | $ | 49,102 | ​ | $ | 56,933
​ Cash equivalents and short-term investments include the following securities with gross unrealized gains and losses (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​ |
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​ |
As of June 30, 2024 | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Fair Value |
US treasury bills | ​ | $ | 4,963 | ​ | $ | — | ​ | $ | — | ​ | $ | 4,963 | ​
Government-sponsored enterprise securities | ​ | ​ | 10,446 | ​ | ​ | — | ​ | ​ | (2) | ​ | ​ | 10,444 | ​
Corporate bonds and commercial paper | ​ |  | 13,771 | ​ |  | — | ​ |  | (7) | ​ |  | 13,764 | ​
Total | ​ | $ | 29,180 | ​ | $ | — | ​ | $ | (9) | ​ | $ | 29,171 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​ |
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | ​ | ​ |
As of December 31, 2023 | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Fair Value |
US treasury bills | ​ | $ | 12,591 | ​ | $ | 3 | ​ | $ | — | ​ | $ | 12,594 | ​
Government-sponsored enterprise securities | ​ | ​ | 11,230 | ​ | ​ | 7 | ​ | ​ | (4) | ​ | ​ | 11,233 | ​
Corporate bonds and commercial paper | ​ |  | 15,172 | ​ |  | 5 | ​ |  | (3) | ​ |  | 15,174 | ​
Total | ​ | $ | 38,993 | ​ | $ | 15 | ​ | $ | (7) | ​ | $ | 39,001 | ​
​ As of June 30, 2024 and December 31, 2023, our cash equivalents and short-term investments had a weighted-average time to maturity of approximately 68 days and 82 days, respectively. Our short-term investments are classified as available-for-sale securities. Accordingly, we have classified these securities as short-term investments on our condensed balance sheets as they are available for use in the current operations. As of June 30, 2024, we had no investments that had been in a continuous unrealized loss position for more than 12 months. As of June 30, 2024, a total of 26 individual securities had been in an unrealized loss position for 12 months or less, and the losses were determined to be temporary. No significant facts or circumstances have arisen to indicate that there has been any significant deterioration in the creditworthiness of the issuers of the securities held by us. Based on our review of these securities, including the assessment of the duration and severity of the unrealized losses, we have no t recognized any credit losses on these securities as of June 30, 2024 and December 31, 2023. The following table shows the fair value and gross unrealized losses of our investments in individual securities that are in an unrealized loss position, aggregated by investment category (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
As of June 30, 2024 |  | Fair Value |  | Unrealized Losses |
Government-sponsored enterprise securities | ​ | $ | 9,694 | ​ | $ | (2) | ​
Corporate bonds and commercial paper | ​ | ​ | 13,265 | ​ | ​ | (7) | ​
Total | ​ | $ | 22,959 | ​ | $ | (9) | ​
​

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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://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//320/tableOfContent + Details
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