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Shareholders' Equity (Summary of Allocation of Stock-Based Compensation Expenses) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 2,711 | $ 2,355 | $ 2,424
Unrecognized compensation costs related to outstanding stock options and RSUs | $ 3,616 |  |
Unrecognized compensation costs related to outstanding stock options and RSUs, period for recognition | 1 year 8 months 23 days |  |
Tax benefit recognized in the consolidated statements of operations related to share based compensation expenses | $ 67 |  |
Cost Of Sales [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 535 | 437 | 372
Research And Development Expense [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 959 | 900 | 953
Selling And Marketing Expense [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 602 | 493 | 569
General And Administrative Expense [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 615 | $ 525 | $ 530

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