Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Common Stock Underlying Potentially Dilutive Securities

As of March 31, 2018, and 2017, the number of shares of common stock underlying potentially dilutive securities include:

	March 31,
	2018		2017
Convertible redeemable preferred stock		—		1,608,654
Convertible promissory notes		—		188,593
Warrants		312,426		—
Options to purchase common stock		526,100		122,000
Total		838,526		1,919,247