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Summary of Significant Accounting Policies - Product Warranty (Details) (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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| Summary Of Significant Accounting Policies - Product Warranty Details | |||
| Balance beginning of year | $ 79,000 | $ 79,000 | $ 79,000 |
| Charges to costs and expenses | 14,000 | 6,000 | 1,000 |
| Other | |||
| Deductions | (24,000) | (6,000) | (1,000) |
| Balance end of year | $ 69,000 | $ 79,000 | $ 79,000 |
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- Details
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- Definition
Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total Increase or Decrease in the standard and extended product warranty liability due to currency translation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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