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Summary of Significant Accounting Policies Equity Incentive Awards (Tables)
6 Months Ended
Jun. 30, 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 VolatilityRisk-free Interest RateExpected TermDividend
Rate
June 30, 2020:    
Employees90 %1.3 %4— %
Officers and non-employee directors78 %1.4 %8— %
June 30, 2019:
Employees63 %2.4 %4— %
Officers and non-employee directors63 %2.6 %8— %
Share-based Payment Arrangement, Option, Activity [Table Text Block]
 OptionsWeighted Average Exercise Price
 (in thousands) 
Outstanding at December 31, 20197,695  $8.95  
Granted3,445  3.25  
Expired(236) 12.92  
Forfeited(298) 7.45  
Outstanding at June 30, 202010,606  7.05  
Exercisable at June 30, 20204,972  $9.72  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
 SharesWeighted Average Grant Date
Fair Value
 (in thousands) 
Outstanding at December 31, 20192,830  $6.35  
Granted3,144  3.27  
Vested(1,219) 6.56  
Forfeited(339) 4.16  
Outstanding at June 30, 20204,416  $4.27