Commitments and Contingencies (Tables)

6 Months Ended

Jun. 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)	Six Months Ended June 30,
	2017			2016
Balance at beginning of period	$	134		$	35
Accruals for warranties issued during the period	167			—
Settlements (in cash or in kind) during the period	(3		)	—
Balance at end of period	$	298		$	35