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Cash, Cash Equivalents and Restricted Cash (Tables) | 9 Months Ended
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Sep. 30, 2021
Cash And Cash Equivalents [Abstract] |
Schedule of Cash, Cash Equivalents, and Restricted Cash | Cash, cash equivalents, and restricted cash balances were as follows:
|  | September 30, |  |  | December 31, |
|  |  | 2021 |  |  |  | 2020 |
Cash and cash equivalents |  | $ | 24,865 |  |  | $ | 28,575 |
Restricted balance for loan agreement |  |  | 4,000 |  |  |  | — |
Letters of credit |  |  | 101 |  |  |  | 131 |
Security for credit cards |  |  | 50 |  |  |  | 50 |
Total cash, cash equivalents and restricted cash shown in the statements of cash flows |  | $ | 29,016 |  |  | $ | 28,756 |

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