Stockholders’ Equity - Summary of Common Stock Reserved for Future Issuance (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Common stock reserved
Dividends on common stock	$ 0.00
Reserved shares of common stock for future issuance	1,704,814	1,784,920
Common Stock Warrants
Common stock reserved
Reserved shares of common stock for future issuance	27,690	27,690
Options Issued and Outstanding
Common stock reserved
Reserved shares of common stock for future issuance	1,593,195	1,414,730
Shares Available for Future Option Grants
Common stock reserved
Reserved shares of common stock for future issuance	83,929	342,500