Subsequent Events (Details) - USD ($)	Jul. 16, 2018	Dec. 29, 2017	Jun. 30, 2018
Subsequent Event [Line Items]
Warrants issued (in shares)		316,163
Class of warrant or right, exercise price of warrants or rights		$ 7.42	$ 6.59
Warrant term		5 years
Subsequent Event
Subsequent Event [Line Items]
Warrants issued (in shares)	11,520,000
Sale of stock, price per share	$ 2.10
Class of warrant or right, exercise price of warrants or rights	$ 2.10
Sale of stock, consideration received on transaction	$ 21,600,000
Convertible preferred stock converted to other securities	$ 7,871,186
Shares issued upon conversion (in shares)	3,748,184
Warrant term	5 years
Class Of Warrant Or Right, Exercise Price Of Warrants Or Rights Prefunded	$ 0.0001
Common Stock | Subsequent Event
Subsequent Event [Line Items]
Sale of stock, number of shares issued in transaction	6,845,000
Warrant | Subsequent Event
Subsequent Event [Line Items]
Sale of stock, number of shares issued in transaction	4,675,000
Sale of stock, price per share	$ 2.0999
Shares issued upon conversion (in shares)	3,748,184