Net Loss Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Earnings Per Share
The following table summarizes the computation of basic and diluted net loss per share for the periods presented:
Year Ended December 31,
202120202019
(in thousands, except share and per share data)
Numerator:
Net loss$(41,139)$(38,121)$(38,150)
Denominator:
Weighted average common shares used for basic and diluted earnings per share23,972,722 23,316,102 20,541,528 
Net loss per share:
Basic and diluted
$(1.72)$(1.63)$(1.86)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The following potentially dilutive securities outstanding at the end of the periods presented have been excluded from the computation of diluted shares:
Year Ended December 31,
202120202019
Options to purchase common shares1,873,087 1,752,620 1,689,016 
Shares issuable on vesting of grants of restricted stock3,982 48,624 128,682 
Warrants to purchase common shares5,500 5,500 5,500 
Total1,882,569 1,806,744 1,823,198