Acquisition of Patents and Intangibles - Acquisition details (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions |
12 Months Ended | ||||
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Nov. 16, 2018 |
Oct. 16, 2012 |
May 31, 2021 |
May 31, 2020 |
May 31, 2019 |
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| Asset Acquisition [Line Items] | |||||
| Acquired intangible assets | $ 1,653 | $ 13,456 | |||
| Stock price, in dollars per share | $ 1.50 | $ 0.50 | |||
| Leronlimab P R O 140 Acquisition [Member] | |||||
| Asset Acquisition [Line Items] | |||||
| Aggregate asset purchase price | $ 3,500 | ||||
| Acquired intangible assets | $ 3,500 | $ 3,500 | |||
| Estimated useful life of acquired intangibles | 10 years | ||||
| Prosta Gene L L C Acquisition [Member] | |||||
| Asset Acquisition [Line Items] | |||||
| Aggregate asset purchase price | $ 15,126 | ||||
| Acquired intangible assets | 15,126 | ||||
| Equity issued | $ 11,558 | ||||
| Shares issued in acquisition | 20.3 | ||||
| Stock price, in dollars per share | $ 0.57 | ||||
| Prosta Gene L L C Acquisition [Member] | Allotment to placement agent | |||||
| Asset Acquisition [Line Items] | |||||
| Shares issued in acquisition | 1.6 |
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- Definition Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer. No definition available.
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- Definition Amount of equity interest of acquirer issued and issuable as part of consideration transferred in asset acquisition. No definition available.
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- Definition N/A. No definition available.
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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- Definition Number of shares of stock issued during the period pursuant to acquisitions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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