Accrued expenses and other current liabilities
12 Months Ended
Dec. 31, 2019
Payables and Accruals [Abstract]  
Accrued expenses and other current liabilities
Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):
 
December 31,
 
2019
 
2018
Payroll and employee-related costs
$
2,245

 
$
2,147

Research and development costs
1,607

 
759

Other current liabilities
759

 
910

Total
$
4,611

 
$
3,816