Revenue by geographic location (Details) - USD ($) |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Apr. 30, 2015 |
Apr. 30, 2014 |
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| Revenues | $ 28,258,000 | $ 30,399,000 | ||||
| Total assets | 6,275,000 | 7,572,000 | ||||
| Long lived assets | 1,498,000 | 1,353,000 | ||||
| United States | ||||||
| Revenues | 23,285,000 | 24,917,000 | ||||
| Total assets | 6,269,000 | 7,556,000 | ||||
| Long lived assets | 1,498,000 | 1,353,000 | ||||
| Europe | ||||||
| Revenues | 3,785,000 | 3,431,000 | ||||
| Total assets | 6,000 | 16,000 | ||||
| Long lived assets | 0 | 0 | ||||
| Other | ||||||
| Revenues | [1] | 1,188,000 | 2,051,000 | |||
| Total assets | [1] | 0 | 0 | |||
| Long lived assets | $ 0 | [1] | $ 0 | |||
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount classified as long lived assets attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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