Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities - Schedule of Accrued Liabilities (Details)

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Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Payables and Accruals [Abstract]    
Payroll, including vacation $ 6 $ 17
Commissions 18 25
Deferred gain on equipment sale 72 72
Accounting and audit 25
Other 6 20
Total accrued liabilities $ 102 $ 159