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Commitments and Contingencies - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Apr. 30, 2016 | Apr. 30, 2015
Commitments and Contingencies [Line Items] |  |
Operating leases, rent expense | $ 304,000 | $ 222,000
Corporate Headquarters [Member] |  |
Commitments and Contingencies [Line Items] |  |
Lease expiration date | Nov. 30, 2016 |
Operating leases, rent expense | $ 85,000 | 85,000
Laboratories and Office Space [Member] |  |
Commitments and Contingencies [Line Items] |  |
Lease expiration date | Dec. 30, 2017 |
Operating leases, rent expense | $ 83,000 | 86,000
New York Laboratory [Member] |  |
Commitments and Contingencies [Line Items] |  |
Lease expiration date | Sep. 30, 2016 |
Renewal term | 1 year |
Operating leases, rent expense | $ 136,000 | $ 47,000

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- References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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- Details
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X
- Details
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Period Type: |