$ in thousands
March 31, 2022
December 31, 2021
Payroll and other employee benefits
$
523
862
Professional fees
1,816
1,379
Research and development costs
2,023
1,895
Operating lease liabilities, current portion
1,287
2,240
Other accrued expenses
617
598
Total accrued expenses and other current liabilities
6,266
6,974
Years Ended December 31,
2021
2020
155
108
—
209
53
525
No definition available.
Tabular disclosure of the components of accrued liabilities.