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Stockholders Equity (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Share-based Compensation | $ 496 | $ 884 | $ 1,810 | $ 2,427
General and administrative [Member] |  |  |  |
Share-based Compensation | 194 | 229 | 549 | 793
Research and development [Member] |  |  |  |
Share-based Compensation | $ 302 | $ 655 | $ 1,261 | $ 1,634

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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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