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Accrued expenses and other current liabilities (Tables)
 12 Months Ended
Dec. 31, 2019
Accrued expenses and other current liabilities  
Schedule of accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

December 31, 

 

    

2019

    

2018

 

 

 

 

 

 

 

Consulting fees

 

$

724

 

$

1,764

Salaries and bonuses

 

 

2,640

 

 

1,404

Social security contributions

 

 

177

 

 

121

Unearned grant income (current)

 

 

725

 

 

833

Loans

 

 

1,224

 

 

 —

Invoices not yet received

 

 

2,673

 

 

 —

Finance lease liabilities

 

 

159

 

 

 —

Other accruals and liabilities

 

 

84

 

 

298

 

 

$

8,406

 

$

4,420