v3.20.4

Cash and cash equivalents and marketable securities (Tables) | 12 Months Ended
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Dec. 31, 2020
Cash and cash equivalents and marketable securities |
Schedule of cash and cash equivalents and marketable securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2019
Cash and cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​
Cash | ​ | $ | 15,286 | ​ | $ | 6,061
Money market funds | ​ |  | 20,825 | ​ |  | 34,340
Total cash and cash equivalents | ​ | $ | 36,111 | ​ | $ | 40,401
Short-term marketable securities-available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​
Marketable securities | ​ | $ | 4,565 | ​ | $ | 40,214
Total short-term marketable securities | ​ | $ | 4,565 | ​ | $ | 40,214

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