Basis of Presentation and Summary of Significant Accounting Policies - Net Loss Per Share (Details) - shares	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Potentially dilutive securities have been excluded from the computation of diluted weighted average shares of common stock outstanding
Securities have been excluded from the computation of diluted weighted average shares of common stock outstanding	3,982,646	2,805,809
Stock options
Potentially dilutive securities have been excluded from the computation of diluted weighted average shares of common stock outstanding
Securities have been excluded from the computation of diluted weighted average shares of common stock outstanding	3,917,256	2,640,077
Common stock warrants
Potentially dilutive securities have been excluded from the computation of diluted weighted average shares of common stock outstanding
Securities have been excluded from the computation of diluted weighted average shares of common stock outstanding	17,125	17,125
BSA and BSPCE warrants
Potentially dilutive securities have been excluded from the computation of diluted weighted average shares of common stock outstanding
Securities have been excluded from the computation of diluted weighted average shares of common stock outstanding	48,265	148,607