Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Changes in Reserve for Product Warranty Claim Costs

Changes in the liability for product warranty claim costs were as follows:

(In thousands)	Nine Months Ended September 30,
	2017			2016
Balance at beginning of period	$	134		$	35
Accruals for warranties issued during the period	169			100
Settlements (in cash or in kind) during the period	(85		)	—
Balance at end of period	$	218		$	135