Revenue Recognition - Summary of Revenues by Type of Item Sold (Detail)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Total	100.00%	100.00%
Revenue Recognized Point In Time
Disaggregation Of Revenue [Line Items]
Revenue on products with an alternative use	88.00%	87.00%
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Revenue on products with no alternative use	12.00%	13.00%