Interim Financial Statements - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 Facility	Jan. 01, 2019 USD ($)	Jan. 01, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of manufacturing facilities | Facility	51
Cumulative effect of new accounting principle of adoption		$ 18	$ 17
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle of adoption		$ 100