Net loss per share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Schedule of Potentially Dilutive Securities Outstanding Excluded from Computations of Diluted Weighted-Average Shares Outstanding

The following potentially dilutive securities outstanding have been excluded from the computations of diluted weighted-average shares outstanding because such securities have an antidilutive impact due to losses reported (in common stock equivalent shares):

	As of December 31,
	2022		2021
Warrants issued to 2010/2012 convertible note    holders to purchase common stock		6,804		6,804
Options to purchase common stock		686,574		408,370
Outstanding restricted stock units		19,068		29,050
Warrants issued to underwriter to purchase common    stock		1,100		1,100
2018 PIPE warrants		34,241		34,241
2022 common warrants		4,000,000		-
Total		4,747,787		479,565