Warrants, Restricted Stock, Restricted Stock Units, Options and Option Matching Rights - Schedule of Restricted Stock and Restricted Stock Units Activity (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, (in shares)	140,000	216,000	137,000
Grants in period, (in shares)	0	1,000	105,000
Vested in period, (in shares)	(56,500)	(55,000)	(22,000)
Forfeited in period, (in shares)	(46,000)	(22,000)	(4,000)
Outstanding, (in shares)	37,500	140,000	216,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, (in shares)	72,900	0	0
Grants in period, (in shares)	161,200	74,500	0
Vested in period, (in shares)	(18,600)	0	0
Forfeited in period, (in shares)	(20,000)	(1,600)	0
Outstanding, (in shares)	195,500	72,900	0