Common Stock (Confidentially Marketed Public Offering Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended
	Aug. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	May 10, 2019	Dec. 31, 2018	Aug. 13, 2018
Components Of Common Stock [Line Items]
Percentage of commission				3.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 0.51			$ 0.51
Gain (Loss) on Derivative Instruments, Net, Pretax		$ (3,159,532)	$ 25,614,305
August 2018 Warrants [Member] | Confidentially Marketed Public Offering
Components Of Common Stock [Line Items]
Issuance of common stock (Shares)	20,000,000	50,000
Warrants to purchase common stock, shares	20,000,000
Negotiated price per unit	$ 0.40
Proceeds from issuance of common stock	$ 8,000,000
Percentage of commission	7.00%
Underwriter commission	$ 560,000
Costs associated with the offering	$ 284,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.40	$ 0.40
Warrant, Term	5 years	4 years 4 months 13 days			4 years 7 months 13 days	5 years
Warrants and Rights Outstanding	$ 8,000,000
Net proceeds from issuance of common stock	7,200,000
Non Cash Charges	$ 8,000,000
Percentage of non cash charges exceeding, net cash proceeds (in percent)	100.00%
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 900,000