Summary of Significant Accounting Policies and Recent Accounting Pronouncements - Property Plant and Equipment Estimated Ranges of Useful Life (Detail) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($) segment	Aug. 15, 2016 segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Property, Plant and Equipment [Line Items]
Reserve for doubtful accounts | $	$ 0.0		$ 0.0	$ 0.0
Number of operating segments | segment	1	2
Plant equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life			5 years
Plant equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life			20 years
Lab equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life			3 years
Lab equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life			7 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life			7 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life			20 years
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Useful life			3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Useful life			7 years
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Useful life			5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Useful life			7 years