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Fair Value Measurements. (Tables) | 12 Months Ended
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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.

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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