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Supplemental disclosure for statement of cash flows (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Supplemental Cash Flow Elements [Abstract]    
Income Taxes Paid $ 37us-gaap_IncomeTaxesPaid $ 17us-gaap_IncomeTaxesPaid
Interest Paid 101us-gaap_InterestPaid 98us-gaap_InterestPaid
Installment Loans Financed Amount 57enz_InstallmentLoansFinancedAmount 154enz_InstallmentLoansFinancedAmount
Capital Lease Obligation Cost Basis 155enz_CapitalLeaseObligationCostBasis  
Adjustment to Additional Paid in Capital Stock Option Issued in Lieu of Cash Payment $ 45enz_AdjustmentToAdditionalPaidInCapitalStockOptionIssuedInLieuOfCashPayment