Summary of significant accounting policies (Tables)

9 Months Ended

Sep. 30, 2021

Summary of significant accounting policies

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

(in thousands)	September 30, 2021		September 30, 2020
Cash	$	56,243	$	6,744
Restricted cash		100		100
	$	56,343	$	6,844

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 September 30, 2021 and 2020 have been excluded from the computation of diluted weighted-average shares of common stock outstanding, as they would be anti-dilutive:

	September 30,
	2021	2020
Stock options(1)	1,936,546	1,316,267
Common stock warrants(1)	1,314,223	1,035,196
Convertible preferred stock(1)	—	5,670,184
	3,250,769	8,021,647

(1) Represents common stock equivalents.