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Shareholders' Equity (Shareholders' Equity) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 05, 2020 | Dec. 31, 2021 | Dec. 31, 2022
Stockholders' Equity Note [Abstract] |  |  |
Preferred stock, shares authorized (in shares) |  | 50,000,000 | 50,000,000
Preferred stock, par value (in usd per share) |  | $ 0.001 | $ 0.001
Preferred stock, shares issued (in shares) |  | 0 | 0
Common stock, shares authorized (in shares) |  | 250,000,000 | 250,000,000
Common stock, par value (in usd per share) | $ 0.001 | $ 0.001 | $ 0.001
Subsidiary, Sale of Stock [Line Items] |  |  |
Common stock, par value (in usd per share) | $ 0.001 | $ 0.001 | $ 0.001
Common stock, shares reserved for future issuance |  |  | 24,533,333
2006 Plan, number of shares available for grant |  |  | 1,996,019
At the Market Offering |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |
Stock issued in transaction (shares) |  | 61,018 |
Net proceeds from transaction |  | $ 321 |
Maximum aggregate offering price | $ 25,000 |  |
Commissions and fees | 3.00% |  |

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