Stockholders' Equity - Common Stock (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Class of Stock [Line Items]
Proceeds from sales of common stock, net of expenses	$ 106,791	$ 0
Stock Issued During Period Restricted Stock Units	278,000
Common Stock [Member]
Class of Stock [Line Items]
Shares of common stock issued	380,081
Cantor Fitzgerald And Co [Member] | Public Offering And Controlled Equity Offering | Common Stock [Member]
Class of Stock [Line Items]
Shares of common stock issued	102,081
Common stock, price per share (in dollars per share)	$ 1.08
Proceeds from sales of common stock, net of expenses	$ 100,000