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Cash, cash equivalents and restricted cash | 12 Months Ended
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Dec. 31, 2023
Cash, cash equivalents and restricted cash |
Cash, cash equivalents and restricted cash | Note 4. Cash, cash equivalents and restricted cash ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | December 31, | ​ | December 31, | ​
​ | 2023 | ​ | ​ | 2022 | ​
​ | (in thousands) | ​
Cash and cash equivalents | $ | 167,297 | ​ | $ | 185,595 | ​
Long-term restricted cash | ​ | 6,654 | ​ | ​ | 752 | ​
Total cash, cash equivalents and restricted cash | $ | 173,951 | ​ | $ | 186,347 | ​
​ As of December 31, 2023, we had $6.7 million in restricted cash which relates to a $5.9 million cash collateral relating to our lease for our headquarters in Beverly, Massachusetts, a $0.7 million letter of credit relating to workers’ compensation insurance and a $0.1 million deposit relating to customs activity.

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