Annual report pursuant to Section 13 and 15(d)

Disclosure - Summary of Significant Accounting Policies - Accounts receivable (Details)

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Disclosure - Summary of Significant Accounting Policies - Accounts receivable (Details) (USD $)
Apr. 30, 2014
Apr. 30, 2013
Notes to Financial Statements    
Trade receivables $ 3,758,000 $ 2,962,000
VAT receivable 125,000 123,000
Allowance for doubtful accounts and sales returns 220,000 200,000
Accounts receivable $ 3,663,000 $ 2,885,000