Subsequent Events (Narrative) (Detail) - LENSAR - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Sep. 22, 2020
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Subsequent Event [Line Items]
Shares issued per common stock owned (shares)			0.075879
Ownership interest prior to disposal (as a percent)		81.50%
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff
Subsequent Event [Line Items]
Cash and cash equivalents		$ 42,701
Disposal Group, Including Discontinued Operations, Accounts Receivable		2,429
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		989
Disposal Group, Including Discontinued Operation, Inventory		13,685
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		783
Disposal Group, Including Discontinued Operations, Leased Equipment		3,033
Disposal Group, Including Discontinued Operation, Intangible Assets		42,113
Disposal Group, Including Discontinued Operation, Other Assets		4,863
Disposal Group, Including Discontinued Operation, Assets		110,596
Disposal Group, Including Discontinued Operation, Accounts Payable		2,349
Disposal Group, Including Discontinued Operation, Other Liabilities		7,678
Disposal Group, Including Discontinued Operation, Liabilities		10,027
Disposal Group, Including Discontinued Operations, Net Assets (Liabilities)		$ 100,569
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff | Forecast
Subsequent Event [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 11,800