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License Agreements - Additional Information (Detail) - LifeCell License and Agreement [Member]
May 31, 2020
USD ($)
License Agreements [Line Items]  
Royalty income since inception of license and royalty agreement $ 9,500,000
Royalty collected since inception of license and royalty agreement 8,500,000
Accounts Receivable [Member]  
License Agreements [Line Items]  
Royalties receivable 1,000,000
Maximum [Member]  
License Agreements [Line Items]  
Royalties receivable 10,000,000
Royalties receivable annually $ 1,000,000