Litigation Funding Agreement (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Litigation Funding Agreement [Member]
Legal expenses incurred attributable to Litigation Funding Agreement [Abstract]
Legal expense	$ 590,000	$ 0	$ 1,271,000	$ 0
R. A. Bianco [Member]
Litigation Funding Commitment [Abstract]
Litigation fund	$ 7,000,000		$ 7,000,000
R. A. Bianco [Member] | Minimum [Member]
Litigation Funding Commitment [Abstract]
Percentage of recovery sharing ratio			30.00%
R. A. Bianco [Member] | Maximum [Member]
Litigation Funding Commitment [Abstract]
Percentage of recovery sharing ratio			45.00%