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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Tax benefit at statutory rate | $ (3,147) | $ (3,114) | $ (3,606)
Increase (reduction) in income taxes resulting from: |  |  |
Valuation allowance change | 4,779 | 1,566 | 3,952
Nondeductible executive compensation | 878 | 1,075 | 580
Net change in uncertain tax positions | 527 | 762 | (1,115)
State income taxes, net of federal benefit | 484 | 73 | (455)
Equity compensation | 472 | (477) | (204)
Foreign income taxes | 415 | 1,138 | 378
Provision to return adjustments | 336 | 63 | 531
Foreign interest disallowance | 151 | 307 | 298
Nondeductible entertainment expenses | 117 | 65 | 94
Foreign deferred items | (112) | 53 | (63)
Research and development credit | (961) | (959) | (457)
Other | 269 | (545) | (425)
Income tax expense (benefit) | $ 4,208 | $ 7 | $ (492)

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