Summary of significant accounting policies (Tables)

3 Months Ended

Mar. 31, 2022

Summary of significant accounting policies

Schedule of reconciliation of the components of cash and restricted cash reported in balance sheet

(in thousands)	March 31, 2022		December 31, 2021
Cash and cash equivalents	$	42,879	$	49,229
Restricted cash		100		100
	$	42,979	$	49,329

Schedule of potentially dilutive securities have been excluded from the computation of diluted weighted-average shares of common stock outstanding, as they would be anti-dilutive

The following potentially dilutive securities outstanding as of March 31, 2022 and 2021 have been excluded from the computation of diluted weighted-average shares of common stock outstanding, as they would be anti-dilutive:

	March 31,
	2022	2021
Stock options(1)	2,009,844	1,636,069
Common stock warrants(1)	1,303,112	1,023,530
	3,312,956	2,659,599

(1) Represents common stock equivalents.