Equity (Preferred Stock) (Details)	12 Months Ended
	Dec. 31, 2018 $ / shares item shares	Dec. 31, 2017 $ / shares shares	Dec. 31, 2016 $ / shares
Mr. Cohen [Member]
Permanent Equity [Line Items]
Ratio of shares to vote	10
Series C Junior Participating Preferred Stock
Permanent Equity [Line Items]
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.001	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	10,000	10,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Preferred Stock, Voting Rights per Share | item	10,000
Preferred Stock, Liquidation Preference Per Share | $ / shares	$ 100,000
Series E Preferred Stock [Member]
Permanent Equity [Line Items]
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	4,983,557	4,983,557
Preferred Stock, Shares Issued	4,983,557	4,983,557
Preferred Stock, Shares Outstanding	4,983,557	4,983,557
Ratio of shares to vote	10
Series E Preferred Stock [Member] | Mr. Cohen [Member]
Permanent Equity [Line Items]
Voting Power, Percentage	29.27%