Stockholder's Equity and Derivative Liability - Series A and Series B Preferred Stock issuances and Beneficial Conversion Feature (Details) - USD ($)						1 Months Ended	5 Months Ended	8 Months Ended
	Feb. 26, 2015	Feb. 10, 2015	Dec. 23, 2014	Dec. 17, 2014	Oct. 14, 2014	Sep. 30, 2016	Feb. 26, 2015	Mar. 31, 2017	Jun. 30, 2016
Series A convertible preferred stock
Series A and Series B Convertible Preferred Stock
Convertible preferred stock, stated value (in dollars per share)		$ 10.00	$ 10.00		$ 10.00			$ 10.00	$ 10.00
Shares converted, Preferred Stock								1,100,000
Series A convertible preferred stock | Purchaser
Series A and Series B Convertible Preferred Stock
Gross proceeds from sale of stock					$ 9,000,000
Additional number of shares available for purchase by the underwriters					350,000
Series B convertible preferred stock
Series A and Series B Convertible Preferred Stock
Convertible preferred stock, stated value (in dollars per share)				$ 10.00				$ 10.00	$ 10.00
Shares converted, Preferred Stock						120,000
Preferred Stock | Series A convertible preferred stock | Purchaser
Series A and Series B Convertible Preferred Stock
Shares issued (in shares)	270,000	30,000	50,000		900,000		1,250,000
Gross proceeds from sale of stock							$ 12,500,000
Preferred Stock | Series B convertible preferred stock | Chimerix, Inc. | License Agreement
Series A and Series B Convertible Preferred Stock
Shares issued in connection with license (in shares)				120,000
Fair value of preferred stock issued				$ 1,200,000
Common Stock
Series A and Series B Convertible Preferred Stock
Shares converted, Common Stock						1,100,000		23,900,000
Common Stock | Chimerix, Inc. | License Agreement
Series A and Series B Convertible Preferred Stock
Shares converted, Common Stock								1,100,000