Net loss per share (Tables)

12 Months Ended

Dec. 31, 2021

Net loss per share [Abstract]

Anti-dilutive Securities Excluded from Computation of Net Loss per Share

The following potential common shares were not considered in the computation of diluted net loss per share as their effect would have been anti-dilutive for the year end periods presented below:

	2021		2020
Series A, Series B and RDO warrants		7,282,999		6,331,674
Stock options		2,096,836		1,784,198
Restricted stock awards including pending issuances of stock for services		6,970		40,000
Former Rexahn warrants		66,538		66,538
Former Rexahn options		82		123