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Description of the Business and Summary of Significant Accounting Policies (Summary of Activity Related to Warranty Liability Included in Other Current Liabilities) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Description of the Business and Summary of Significant Accounting Policies [Abstract]    
Beginning balance $ 300 $ 423
Warranty accruals and adjustments 38 (78)
Warranty claims (7) (24)
Ending balance $ 331 $ 321