Acquisitions - Additional Information (Detail) - USD ($)		2 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended
	May 07, 2018	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Feb. 22, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Intangible assets acquired in acquisition		$ 169,913,000	$ 169,913,000		$ 169,913,000	$ 169,913,000
Goodwill		617,814,000	617,814,000		617,814,000	617,814,000			$ 454,612,000
Acquisition related costs			3,437,000	$ 0		5,213,000	$ 0
Financing costs						12,900,000
Contract base price	$ 375,000,000.0
Gain (loss) on extinguishment of debt			(12,938,000)	(39,639,000)		(12,938,000)	(39,639,000)
Increase in cost of sales		116,136,000	116,136,000		116,136,000	116,136,000			$ 82,617,000
Net sales			196,349,000	157,947,000		365,497,000	315,502,000
Net loss			(24,511,000)	$ (21,138,000)		$ (30,494,000)	$ (13,727,000)
Bridgemedica, LLC [Member]
Business Acquisition [Line Items]
Date of acquisition						Feb. 22, 2018
Acquisition percentage								100.00%
Net sales					3,600,000
Net loss					100,000
Paragon Medical Inc [Member]
Business Acquisition [Line Items]
Intangible assets acquired in acquisition	164,200,000	163,300,000	163,300,000		163,300,000	$ 163,300,000
Goodwill	$ 157,421,000	155,600,000	155,600,000		155,600,000	155,600,000
Goodwill expected tax deductible amount		2,800,000	2,800,000		2,800,000	2,800,000
Acquisition related costs						4,900,000
Acquisition percentage	100.00%
Cash payment to acquire business	$ 390,961,000
Cash acquired from acquisition	13,418,000
Consideration transferred	$ 392,200,000
Other current assets accrued		1,300,000	$ 1,300,000		$ 1,300,000	$ 1,300,000
Net sales		27,100,000
Net loss		$ 1,700,000