Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities - Accrued liabilities (Details)

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Accrued Liabilities - Accrued liabilities (Details) (USD $)
12 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Payables and Accruals [Abstract]    
Payroll, including vacation $ 253,000 $ 259,000
Commissions 60,000 100,000
Bonuses 50,000 130,000
Lease abandonment 100,000   
Other 221,000 277,000
Total accrued liabilities $ 684,000 $ 766,000