Sale of Makena - Additional Information (Detail) (USD $)	1 Months Ended		3 Months Ended
	Feb. 03, 2011	Jan. 16, 2008	Dec. 29, 2012	Mar. 24, 2012	Mar. 24, 2011
Sale Of Intellectual Property [Line Items]
Transaction price of sale of intellectual property assets		$ 82,000,000
Amended transaction price as a result of executing amendment			199,500,000
Amount received upon FDA approval	12,500,000
Gain on net of certain contingent legal fees and amounts due to inventor			53,884,000		84,500,000
Scheduled amounts received				12,500,000
Additional amounts to be received under the amended agreement			95,000,000
Royalty on sales due	5.00%
Future payments			60,000,000
Previously received [Member] | Parent Company [Member]
Sale Of Intellectual Property [Line Items]
Transaction price amounts received	$ 79,500,000
Minimum [Member]
Sale Of Intellectual Property [Line Items]
Period sales price is due from FDA approval, months			18
Maximum [Member]
Sale Of Intellectual Property [Line Items]
Period sales price is due from FDA approval, months			30