Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jan. 31, 2015	Jan. 31, 2014
Cash Flows from Operating Activities
Net income	$ 1,720us-gaap_NetIncomeLoss	$ 709us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation	689us-gaap_Depreciation	571us-gaap_Depreciation
Amortization	543us-gaap_AdjustmentForAmortization	366us-gaap_AdjustmentForAmortization
Provision for doubtful accounts receivable	8us-gaap_ProvisionForDoubtfulAccounts	6us-gaap_ProvisionForDoubtfulAccounts
Stock-based compensation	388us-gaap_ShareBasedCompensation	605us-gaap_ShareBasedCompensation
Deferred income taxes	(67)us-gaap_DeferredIncomeTaxExpenseBenefit	(35)us-gaap_DeferredIncomeTaxExpenseBenefit
(Increase) decrease in:
Accounts receivable	1,638	1,164
Inventories	(36)us-gaap_IncreaseDecreaseInInventories	(1,854)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses	177	(254)
Income taxes refundable	0	254
Increase (decrease) in:
Accounts payable	730	(213)
Accrued expenses	(243)	(940)
Deferred revenue	(644)	(644)
Income taxes payable	(120)	(37)
Net cash provided by (used in) operating activities	4,783	(302)
Cash Flows from Investing Activities
Purchase of property and equipment	(393)	(735)
Acquisition of Sterimedix	(13,177)	0
Acquisition of patents and other intangibles	(69)	(139)
Net cash used in investing activities	(13,639)	(874)
Cash Flows from Financing Activities
Deferred financing costs	(123)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Proceeds from borrowings under the Term Loan Facility	2,750	0
Proceeds from the issuance of common stock	28	36
Tax benefit associated with the exercise of non-qualified stock options	16	25
Net cash provided by financing activities	2,671	61
Foreign exchange rate effect on cash and cash equivalents	(392)	(133)
Net decrease in cash and cash equivalents	(6,577)	(1,248)
Cash and cash equivalents
Beginning	15,443	12,470
Ending	$ 8,866	$ 11,222

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