Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Common Stock Underlying Potentially Dilutive Securities

As of December 31, 2017, and 2016, the number of shares of common stock underlying potentially dilutive securities include:

	December 31,
	2017		2016
Convertible redeemable preferred stock	—			638,416
Warrants		317,630	—
Options to purchase common stock		463,600		122,000
Total		781,230		760,416