Variable Interest Entities (VIEs) - Additional Information (Detail)		1 Months Ended	12 Months Ended
	Jan. 02, 2007 company	Jul. 31, 2015 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
Variable Interest Entity [Line Items]
Number of Companies with Rights to Intellectual Property | company	2
Patent and Licensing Fee - Aggregate		$ 2,400,000
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Minimum aggregate royalty payments			$ 8,000,000.0	$ 6,400,000.0	$ 6,700,000.0
Payment for Administrative Fees			200,000	200,000	200,000
Variable Interest Entity, Primary Beneficiary [Member] | Minimum
Variable Interest Entity [Line Items]
Minimum aggregate royalty payments			5,000,000.0
Development Partner [Member] [Member]
Variable Interest Entity [Line Items]
Related Party Transaction, Amounts of Transaction			$ 0	$ 255,000	$ 200,000