Significant Accounting Policies (Summary of Activity Related to Warranty Liability Included in Other Current Liabilities) (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Significant Accounting Policies [Abstract] | ||
| Beginning balance | $ 615 | $ 300 |
| Warranty accruals and adjustments | (82) | 333 |
| Warranty claims | (14) | (18) |
| Ending balance | $ 519 | $ 615 |