Quarterly report pursuant to sections 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail) (USD $)
 0 Months Ended 6 Months Ended
Oct. 16, 2012
Nov. 30, 2013
Commitment And Contingencies [Line Items]    
Cash severance payment   $ 276,000
Option immediate vesting   50,000
Asset Purchase Agreement Aggregate Consideration Paying Period 10 years  
Progenics Pharmaceuticals, Inc
    
Commitment And Contingencies [Line Items]    
Royalty on every net sales 5.00%  
Initial Payment
    
Commitment And Contingencies [Line Items]    
Asset purchase, cash paid 3,500,000  
Milestone Payments | US Phase III trial
    
Commitment And Contingencies [Line Items]    
Asset purchase, cash paid 1,500,000  
Milestone Payments | US new drug application approval by the FDA
    
Commitment And Contingencies [Line Items]    
Asset purchase, cash paid 5,000,000  
Development Milestone Payments
    
Commitment And Contingencies [Line Items]    
Royalty on every net sales 7.50%  
Asset Purchase Agreement Aggregate Consideration Paying Period 10 years  
Minimum annual license maintenance fees 150,000  
Development Milestone Payments | US Phase III trial
    
Commitment And Contingencies [Line Items]    
Asset purchase, cash paid 1,000,000  
Development Milestone Payments | US new drug application approval by the FDA
    
Commitment And Contingencies [Line Items]    
Asset purchase, cash paid 500,000  
Development Milestone Payments | New Drug Application with the FDA
    
Commitment And Contingencies [Line Items]    
Asset purchase, cash paid 500,000  
Director
    
Commitment And Contingencies [Line Items]    
Salary   13,890
Cash severance payment   $ 13,890
Severance period   33 months
Reimbursement of health insurance period   9 months
Director | Stock Option Award Agreement dated Dec 6,2010
    
Commitment And Contingencies [Line Items]    
Stock option award agreement   500,000
Stock Option granted   $ 1.19
Director | Stock Option Award Agreement dated September 22,2010
    
Commitment And Contingencies [Line Items]    
Options granted   25,000
Director | Stock Option Award Agreement dated April 16,2012
    
Commitment And Contingencies [Line Items]    
Stock option award agreement   750,000
Stock Option granted   $ 2.00
Option immediate vesting   1,500,000
Options forfeiture   750,000