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Fair Value Measurements. (Tables)
12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of used and related fair value for the warrants
Original Issuance  Exercise
Price
   Volatility   Risk Free
Interest
Rate
   Term
(years)
   Fair Value 
12/22/19  $1.00    178.0%   0.08%   0.10   $8,474 

 

Original Issuance  Exercise
Price
   Volatility   Risk Free
Interest
Rate
   Term
(years)
   Fair Value 
12/22/19  $1.00    76.0%   1.66%   3.00   $977 

 

Schedule of fair value of pre-funded warrants and other warrants
Warrant Type  Valuation
Date
  Exercise
Price
   Volatility   Risk Free
Interest
Rate
   Term
(years)
   Fair Value 
Pre-funded  10/28/2020  $0.01    97.0%   0.34%   5.00   $23,638 
Other  10/28/2020  $9.76    134.0%   0.14%   1.50   $27,048 
Pre-funded  11/16/2020  $0.01    97.0%   0.40%   4.95   $21,916 
Other  11/24/2020  $9.76    135.0%   0.13%   1.45   $31,231 

 

Schedule of fair values of warrants based on unobservable inputs
   Warrants to
Senior
Noteholders
   Pre-funded
Warrants
   Other
Warrants
 
Balance, December 31, 2019  $977   $
   $
 
Issuance of warrants in October 2020 offering   
    23,638    27,048 
Exercise of warrants/reclass to equity in 2020   (8,474)   (21,917)   (31,231)
Adjustments to fair value for 2020   7,497    (1,721)   4,183 
Balance, December 31, 2021  $
   $
   $
 

 

Schedule of recurring and nonrecurring fair value measurements
                   Benefit Plan 
   Fair               Percentage 
   Value   Level 1   Level 2   Level 3   Allocation 
Assets:                    
Derivative financial instruments  $15,839   $15,839   $
   $
      
Long-lived assets held-for-sale   1,000    
    
    1,000      
Defined benefit plan assets(1)                         
(pooled separate accounts):                         
Large U.S. Equity(2)   5,612    
    5,612    
    28%
Small/Mid U.S. Equity(3)   3,684    
    3,684    
    18%
International Equity(4)   2,909    
    2,909    
    15%
Fixed Income(5)   7,782    
    7,782    
    39%
   $36,826   $15,839   $19,987   $1,000      
                          
Liabilities:                         
Derivative financial instruments  $13,582   $13,582   $
   $
      

 

                   Benefit Plan 
   Fair               Percentage 
   Value   Level 1   Level 2   Level 3   Allocation 
Assets:                    
Derivative financial instruments  $17,149   $17,149   $
   $
      
Long-lived assets held-for-sale   58,295    
    
    58,295      
Defined benefit plan assets(1)                         
(pooled separate accounts):                         
Large U.S. Equity(2)   5,470    
    5,470    
    31%
Small/Mid U.S. Equity(3)   2,605    
    2,605    
    15%
International Equity(4)   2,921    
    2,921    
    17%
Fixed Income(5)   6,592    
    6,592    
    37%
   $93,032   $17,149   $17,588   $58,295      
                          
Liabilities:                         
   $
   $
   $
   $
      

 

(1)See Note 9 for accounting discussion.

 

(2)This category includes investments in funds comprised of equity securities of large U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.

 

(3)This category includes investments in funds comprised of equity securities of small- and medium-sized U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.

 

(4)This category includes investments in funds comprised of equity securities of foreign companies including emerging markets. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.

 

(5)This category includes investments in funds comprised of U.S. and foreign investment-grade fixed income securities, high-yield fixed income securities that are rated below investment-grade, U.S. treasury securities, mortgage-backed securities, and other asset-backed securities. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.