Shareholders' Equity - Warrant Exercises (Details) - 2017 Underwritten Public Offering - Maxim Group, LLC - Warrant - Series B Preferred Stock - Warrants Issued As Part Of 2017 Underwritten Public Offering - USD ($)	20 Months Ended
	Mar. 31, 2018	Jul. 31, 2017
Class of Warrant or Right [Line Items]
Granted		$ 9,000,000
Exercised	$ 7,918,400
Expired	154,800
Remaining	926,800
Warrant Tranche One
Class of Warrant or Right [Line Items]
Granted		3,000,000
Exercised	3,000,000
Expired	0
Remaining	0
Warrant Tranche Two
Class of Warrant or Right [Line Items]
Granted		3,000,000
Exercised	2,845,200
Expired	154,800
Remaining	0
Warrant Tranche Three
Class of Warrant or Right [Line Items]
Granted		$ 3,000,000
Exercised	2,073,200
Expired	0
Remaining	$ 926,800