Stockholders' Equity (Details 4) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Non Vested shares, Balance (in shares)	0	659	14,476
Non Vested shares, Granted (in shares)	1,158,963	7,500	7,500
Non Vested shares, Vested (in shares)	(183,754)	(8,159)	(21,317)
Non Vested shares, Forfeited (in shares)	0	0	0
Non Vested shares, Balance (in shares)	975,209	0	659
Weighted average grant-date fair value, Balance (in dollars)	$ 0	$ 22.75	$ 14.46
Weighted average grant-date fair value, Granted (in dollars)	10.06	13.34	10.33
Weighted average grant-date fair value, Vested (in dollars)	10.10	14.10	12.75
Weighted average grant-date fair value, Forfeited (in dollars)	0	0	0
Weighted average grant-date fair value, Balance (in dollars)	$ 10.05	$ 0	$ 22.75