Basis of Presentation and Summary of Significant Accounting Policies - Net Loss Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 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	3,416,272	2,555,132
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	3,340,732	2,381,288
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	58,415	156,719