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Accrued and Other Current Liabilities
12 Months Ended
Dec. 31, 2021
Accrued and Other Current Liabilities [Abstract]  
Accrued and Other Current Liabilities

8.    Accrued and Other Current Liabilities

Accrued and other current liabilities consisted of the following at December 31, 2020 and 2021 (in thousands):

 

December 31, 

December 31, 

    

2020

    

2021

Accrued research and development

$

781

$

2,310

Accrued legal and professional fees

 

325

 

233

Other current liabilities

 

866

 

634

$

1,972

$

3,177

Other current liabilities for the year ended December 31, 2020 includes an approximately $80,000 Payment Protection Program loan received during the year from the US Federal government and subsequently repaid in February 2021.