Warrants to Purchase Common Stock (Narrative) (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
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| Investor Warrant [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Award exercised | 2,900,959 | |
| Warrant Issuance [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Award exercised | 0 | |
| Stock-based compensation expense | $ 0 | $ 0 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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