Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Rollforward of the Fair Value as Determined by Level 3

The following table provides a rollforward of the fair value of these liabilities, as determined by Level 3 unobservable inputs including management’s forecast of future revenues for these acquired businesses, as well as, in the case of the Restore Flow allograft acquisition, management’s estimate of the likelihood of continued employment of certain retained employees.

	Six months ended June 30,
	2018			2017
	(in thousands)
Beginning balance	$	1,300		$	1,320
Additions		—			—
Payments		(1,142	)		(51	)
Change in fair value included in earnings		42			35
Ending balance	$	200		$	1,304