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Stock-Based Compensation, Equity Incentive Plans (Details) - shares | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Sep. 03, 2021 | May 31, 2021 | Mar. 15, 2021 | Dec. 31, 2020
Stock Options [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock option outstanding (in shares) | 3,988,000 |  |  |  | 0
2020 Equity Incentive Plan [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock-based compensation shares authorized (in shares) | 2,601,000 |  |  |  |
Percentage of number of shares of common stock outstanding |  | 5.00% |  |  |
2020 Equity Incentive Plan [Member] | Minimum [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock-based compensation shares authorized (in shares) |  | 5,116,000 |  |  |
2020 Equity Incentive Plan [Member] | Maximum [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock-based compensation shares authorized (in shares) |  | 8,485,000 |  |  |
2020 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock option outstanding (in shares) | 320,000 |  |  |  |
2020 Equity Incentive Plan [Member] | Stock Options [Member] | Maximum [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock-based compensation shares authorized (in shares) |  |  |  | 3,369,000 |
2020 Equity Incentive Plan [Member] | Incentive Stock Options [Member] | Maximum [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock based compensation stock option term period | 10 years |  |  |  |
2020 Equity Incentive Plan [Member] | Nonqualified Stock Options [Member] | Maximum [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock based compensation stock option term period | 10 years |  |  |  |
2020 Equity Incentive Plan [Member] | RSU [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock option outstanding (in shares) | 18,000 |  |  |  |
2021 Inducement Plan [Member] | Maximum [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock-based compensation shares authorized (in shares) |  |  | 1,500,000 |  |
2021 Inducement Plan [Member] | Stock Options [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock option outstanding (in shares) | 443,000 |  |  |  |
2021 Inducement Plan [Member] | RSU [Member] |  |  |  |  |
Stock-based Compensation [Abstract] |  |  |  |  |
Stock units outstanding (in shares) | 222,000 |  |  |  |

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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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