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Income Taxes (Schedule of deferred tax assets and liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Deferred Tax Assets [Abstract] |  |
Deferred revenue | $ 1,598 | $ 838
Accrued expenses | 638 | 535
Net operating loss and tax credit carryforwards | 35 | 211
Lease liability | 344 | 278
Other temporary differences | 589 | 218
Deferred tax asset | 3,204 | 2,080
Deferred tax liabilities: |  |
Property, plant and equipment | (795) | (700)
Right of use assets | (344) | (278)
Undistributed earnings | (1,061) | (875)
Total deferred tax liabilities | (2,200) | (1,853)
Net deferred tax assets | $ 1,004 | $ 227

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