Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Reconciliation of liabilities measured at fair value using significant unobservable inputs

The following table provides a reconciliation of liabilities measured at fair value using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2018 (in thousands):

	September 30, 2018
Balance at January 1, 2018	$	—
Contingent consideration liability recorded upon acquisition of SafeOp		3,200
Change in fair value measurement		—
Balance at March 31, 2018		3,200
Change in fair value measurement		100
Balance at June 30, 2018	$	3,300
Settlement of milestone #1		(1,446	)
Change in fair value measurement		546
Balance at September 30, 2018	$	2,400