v2.4.0.6
Sale of Makena - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended
Feb. 03, 2011
Jan. 16, 2008
Mar. 24, 2012
Mar. 24, 2011
Mar. 30, 2013
Mar. 24, 2012
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     12,424,000 84,500,000 53,884,000 12,424,000
Scheduled amounts received     12,500,000      
Additional amounts to be received under the amended agreement         95,000,000  
Royalty on sales due 5.00%          
Final payment received         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