Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Values of Short-term Investments (Details)

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Fair Value Measurements - Summary of Values of Short-term Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mutual Fund    
Schedule Of Available For Sale Securities [Line Items]    
Short-term investments, Cost $ 594 $ 572
Short-term investments, Unrealized Gains 5 30
Short-term investments, Fair Value 599 602
Certificates of Deposit    
Schedule Of Available For Sale Securities [Line Items]    
Short-term investments, Cost 6,695 5,634
Short-term investments, Fair Value $ 6,695 $ 5,634