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Commitments and Contingencies - Narrative (Details) | 12 Months Ended
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Apr. 30, 2020 USD ($)
Minimum |
Commitments and Contingencies [Line Items] |
Royalty fee per tumor sample | $ 0
Royalty payment, as percent of contract price | 2.00%
Maximum |
Commitments and Contingencies [Line Items] |
Royalty fee per tumor sample | $ 7,000
Royalty payment, as percent of contract price | 5.00%

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- Definition Collaboration Arrangement Royalty Fee + References No definition available. + Details
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- Details
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- Details
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