Subsequent Event (Details) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions	Jul. 09, 2018	Jul. 02, 2018
Subsequent Event (Textual)
Underwritten public offering of common stock shares		7,766,990
Warrants to purchase up to an aggregate of common stock shares		3,106,796
Market offering price		$ 1.03
Additional warrants exercised to purchase common stock shares	1,165,048	466,019
Warrants exercise price		$ 2.25
Total gross proceeds	$ 9.2