Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Stock-Based Compensation [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Expected Volatility		Risk-free Interest Rate		Expected Term	Dividend Rate
June 30, 2016:
Employees	63	%	1.1	%	4	—	%
Officers and non-employee directors	83	%	1.6	%	8	—	%
June 30, 2015:
Employees	63	%	1.2	%	4	—	%
Officers and non-employee directors	81	%	1.8	%	8	—	%

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Options		Weighted Average Exercise Price
	(in thousands)
Outstanding at December 31, 2015	4,217		$	12.35
Granted	1,130		9.23
Exercised	(66	)	9.98
Expired	(166	)	27.36
Forfeited	(12	)	8.65
Outstanding at June 30, 2016	5,103		11.21
Exercisable at June 30, 2016	2,911		$	12.94

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

	Shares		Weighted Average Grant Date Fair Value
	(in thousands)
Outstanding at December 31, 2015	637		$	8.74
Granted	496		8.20
Vested	(206	)	9.75
Forfeited	(33	)	10.95
Nonvested at June 30, 2016	894		$	8.12