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Commitments and Contingencies (Details Narrative) (USD $)
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12 Months Ended | ||
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Apr. 30, 2013
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Apr. 30, 2012
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Apr. 30, 2011
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| Commitments and Contingencies Disclosure [Abstract] | |||
| Rental expense | $ 423,000 | $ 516,000 | $ 655,000 |
| Open purchase orders outstanding | 1,481,000 | ||
| Royalties charged to operations | 92,000 | 94,000 | 93,000 |
| Security deposit | $ 52,000 | ||
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- Details
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- Definition
The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. No definition available.
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| X | ||||||||||
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- Definition
Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. No definition available.
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| X | ||||||||||
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- Definition
Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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