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Other Current Liabilities | 9 Months Ended
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Sep. 30, 2021
Other Current Liabilities |
Other Current Liabilities |
6. | Other Current Liabilities
Other current liabilities consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
(in thousands) | ​ | 2021 | ​ | 2020
Accrued R&D related costs | ​ | $ | 4,310 | ​ | $ | 609
Accrued employee bonuses | ​ | ​ | 2,111 | ​ | ​ | 1,222
Accrued professional fees | ​ | ​ | 960 | ​ | ​ | 577
Accrued payroll related costs | ​ | ​ | 654 | ​ | ​ | 444
Early exercise of unvested stock options | ​ | ​ | 237 | ​ | ​ | 578
Accrued taxes | ​ | ​ | 67 | ​ | ​ | 198
Other |  |  | 256 | ​ | ​ | 238
Total |  | $ | 8,595 | ​ | $ | 3,866
​

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- Definition The entire disclosure for other liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20,24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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