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Summary of Significant Accounting Policies - Schedule of Warranty Activity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at the beginning of the year $ 314 $ 81
Accruals for warranties issued 170 255
Adjustments to existing warranties (95) 0
Settlements made during the year (in kind) (58) (22)
Accrued warranty expense $ 331 $ 314