Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities (Details) - Accrued liabilities

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Accrued Liabilities (Details) - Accrued liabilities - USD ($)
$ in Thousands
Apr. 30, 2018
Jul. 31, 2017
Accrued liabilities [Abstract]    
Payroll, benefits, and commissions $ 4,343 $ 4,092
Legal fee expense 2,401 599
Professional fees 764 442
Research and development   143
Other 2,287 1,444
$ 9,795 $ 6,720