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Stockholders Equity (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Share-based Compensation | $ 664 | $ 996
General and administrative [Member] |  |
Share-based Compensation | 147 | 324
Research and development [Member] |  |
Share-based Compensation | $ 517 | $ 672

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Details
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- Details
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