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License Agreements - Additional Information (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Nov. 30, 2018 USD ($) Agreement | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($)
License Agreements [Line Items] |  |  |
Types of agreements | Agreement | 2 |  |
LifeCell License and Agreement [Member] |  |  |
License Agreements [Line Items] |  |  |
Royalty income since inception of license and royalty agreement | $ 7,000,000 |  |
Royalty collected since inception of license and royalty agreement | 6,500,000 |  |
LifeCell License and Agreement [Member] | Accounts Receivable [Member] |  |  |
License Agreements [Line Items] |  |  |
Royalties receivable | 500,000 |  |
LifeCell License and Agreement [Member] | Maximum [Member] |  |  |
License Agreements [Line Items] |  |  |
Royalties receivable | $ 1,000,000 | $ 1,000,000 | $ 1,000,000

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