Summary of Significant Accounting Policies Equity Incentive Awards (Tables)

3 Months Ended

Mar. 31, 2020

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Abstract]

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

	Expected Volatility		Risk-free Interest Rate		Expected Term	Dividend Rate
March 31, 2020:
Employees	89	%	1.3	%	4	—	%
Officers and non-employee directors	77	%	1.4	%	8	—	%
March 31, 2019:
Employees	63	%	2.5	%	4	—	%
Officers and non-employee directors	63	%	2.6	%	8	—	%

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Options	Weighted Average Exercise Price
	(in thousands)
Outstanding at December 31, 2019	7,695	$	8.95
Granted	3,301	3.31
Expired	(202)	13.30
Forfeited	(73)	11.10
Outstanding at March 31, 2020	10,721	7.11
Exercisable at March 31, 2020	4,731	$	9.83

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Shares	Weighted Average Grant Date Fair Value
	(in thousands)
Outstanding at December 31, 2019	2,830	$	6.35
Granted	3,060	3.31
Vested	(1,032)	7.02
Forfeited	(34)	5.28
Outstanding at March 31, 2020	4,824	$	4.29