v3.21.1

Cash and cash equivalents and marketable securities | 3 Months Ended
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Mar. 31, 2021
Cash and cash equivalents and marketable securities |
Cash and cash equivalents and marketable securities | 3. Cash and cash equivalents and marketable securities Cash and cash equivalents and marketable securities consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Cash and cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​
Cash | ​ | $ | 7,809 | ​ | $ | 15,286
Money market funds | ​ |  | 28,463 | ​ |  | 20,825
Total cash and cash equivalents | ​ | $ | 36,272 | ​ | $ | 36,111
Short-term marketable securities-available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities | ​ | $ | — | ​ | $ | 4,565
Total short-term marketable securities | ​ | $ | — | ​ | $ | 4,565
​ For the three months ended March 31, 2021 and 2020, interest income was $10 and $296, respectively, which is included in interest income and other expense, net in the accompanying condensed consolidated statements of operations.

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + 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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