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Commitment and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Matching Contributions for Defined Contribution Retirement Savings Plan
The following table presents the matching contributions made by the Company for the three and nine months ended September 30, 2021 and 2020:
Three months ended September 30,Nine months ended September 30,
(in thousands)2021202020212020
401(k) matching contributions$29 $20 $149 $125