Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Schedule of Activities Related to Warranty Obligations

Activities related to warranty obligations were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2019			2018			2019			2018
Beginning balance	$	1,291		$	943		$	1,236		$	708
Provision for warranty		490			597			1,426			1,681
Utilization		(565	)		(447	)		(1,446	)		(1,296	)
Ending balance	$	1,216		$	1,093		$	1,216		$	1,093

Summary of Royalty Expense

The Company recognized royalty expense during the periods indicated as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Royalty expense	$	829	$	795	$	2,259	$	2,280