Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities - Accrued liabilities (Details)

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Accrued Liabilities - Accrued liabilities (Details) - USD ($)
Apr. 30, 2015
Apr. 30, 2014
Payables and Accruals [Abstract]    
Payroll, including vacation $ 27,000 $ 217,000
Commissions $ 10,000 75,000
Bonuses   70,000
Lease legal settlement   225,000
Deferred gain on equipment sale $ 72,000 72,000
Accounting and audit 53,000 85,000
Other 120,000 185,000
Total accrued liabilities $ 282,000 $ 929,000