Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Number of Shares of Common Stock Underlying Potentially Dilutive Securities

As of June 30, 2018 and 2017, the number of shares of common stock underlying potentially dilutive securities include:

	June 30,
	2018		2017
Convertible redeemable preferred stock		—		1,608,654
Convertible promissory notes		—		188,593
Warrants		10,974		—
Options to purchase common stock		666,100		122,000
Total		677,074		1,919,247