Commitments and Contingencies (Narrative) (Detail) - USD ($) $ in Thousands		Sep. 21, 2017	Mar. 31, 2019	Dec. 31, 2018	Apr. 01, 2014
Guarantor Obligations [Line Items]
Accounts Receivable, Net, Noncurrent	[1]			$ 1,400
Total lease payments for the duration of the guarantee			$ 31,000
Accrued lease liability			10,700	$ 10,700
kaleo Note Receivable [Member]
Guarantor Obligations [Line Items]
Financing Receivable, Gross					$ 150,000
Proceeds from Collection of Notes Receivable		$ 141,700
Noden [Member] | Next twelve months [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			50,000
Noden [Member] | Next twenty-four months [Member] [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			123,600
Noden [Member] | Bulk product [Member] | Next twelve months [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			22,500
LENSAR [Member] | Next twelve months [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			5,100
LENSAR [Member] | Next twenty-four months [Member] [Member]
Guarantor Obligations [Line Items]
Purchase Obligation			$ 7,400

[1] unaudited