Segment Information - Summary of Revenues on Percentage Basis by Geographic Regions (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues on a percentage basis by geographic regions, based on the country	100.00%	100.00%	100.00%
United States [Member]
Segment Reporting Information [Line Items]
Revenues on a percentage basis by geographic regions, based on the country	62.00%	64.00%	76.00%
South America [Member]
Segment Reporting Information [Line Items]
Revenues on a percentage basis by geographic regions, based on the country	11.00%	13.00%
Japan [Member]
Segment Reporting Information [Line Items]
Revenues on a percentage basis by geographic regions, based on the country	2.00%	2.00%	6.00%
Europe [Member]
Segment Reporting Information [Line Items]
Revenues on a percentage basis by geographic regions, based on the country	18.00%	19.00%	14.00%
Other [Member]
Segment Reporting Information [Line Items]
Revenues on a percentage basis by geographic regions, based on the country	7.00%	2.00%	4.00%