| 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. |
|