Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders’ Equity

Summary of Common Stock Reserved for Future Issuance

	December 31,
	2017	2016
Options issued and outstanding	1,593,195	1,414,730
Shares available for future option grants	83,929	342,500
Common stock warrants	27,690	27,690
Total	1,704,814	1,784,920