Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments And Contingencies [Abstract]

Schedule of Changes in Warranty Reserves

Changes in the Company’s warranty reserves are as follows:

	Nine Months Ended September 30,
	2018			2017
Balance, beginning of the period	$	2,427		$	1,788
Accruals		2,720			2,511
Usage		(2,589	)		(2,025	)
Balance, end of the period	$	2,558		$	2,274