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Net Loss Per Share Attributable to Common Stockholders
 6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Net Loss Per Share Attributable to Common Stockholders Net Loss Per Share Attributable to Common Stockholders
The following tables present calculations for basic and diluted net loss per share (in thousands, except per share amounts):
Three Months Ended
June 30,		Six Months Ended
June 30,
2021202020212020
Net loss$(3,083)$(5,476)$(6,011)$(16,713)
Less accretion of redeemable convertible preferred stock(25)(22)(51)(45)
Loss applicable to common stockholders basic and diluted(3,108)(5,498)$(6,062)$(16,758)
Weighted-average shares used in computing net loss per share attributable to common shareholders, basic and diluted13,636 13,121 13,513 13,110 
Net loss per share attributable to ordinary shareholders, basic and diluted$(0.23)$(0.42)$(0.45)$(1.28)
The following outstanding shares of common stock equivalents (in thousands) as of the periods presented were excluded from the computation of diluted net loss per share for the periods presented because the impact of including them would have been anti-dilutive (in thousands):
As of June 30,
20212020
Convertible preferred stock35,793 31,755 
Stock options3,305 3,609 
Unvested restricted stock awards288 138 
Common stock warrants50 42 
Total39,436 35,544