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Summary of Significant Accounting Policies - Schedule of Warranty Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at the beginning of the year $ 258 $ 174
Accruals for warranties issued 78 51
Adjustments to existing warranties (91) 103
Settlements made during the year (in kind) (50) (70)
Accrued warranty expense $ 195 $ 258