Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Apr. 30, 2015	Apr. 30, 2014
Cash Flows from Operating Activities
Net income	$ 2,949us-gaap_NetIncomeLoss	$ 1,652us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,145us-gaap_Depreciation	864us-gaap_Depreciation
Amortization of intangible assets	892us-gaap_AmortizationOfIntangibleAssets	553us-gaap_AmortizationOfIntangibleAssets
Amortization of deferred financing costs	14us-gaap_AmortizationOfFinancingCosts	0us-gaap_AmortizationOfFinancingCosts
Accretion of contingent acquisition liability	128	0
Provision for doubtful accounts receivable	(35)us-gaap_ProvisionForDoubtfulAccounts	66us-gaap_ProvisionForDoubtfulAccounts
Stock-based compensation	567us-gaap_ShareBasedCompensation	807us-gaap_ShareBasedCompensation
Deferred income taxes	(218)us-gaap_DeferredIncomeTaxExpenseBenefit	1,643us-gaap_DeferredIncomeTaxExpenseBenefit
Gain on sale	0us-gaap_GainLossOnDispositionOfAssets	(9)us-gaap_GainLossOnDispositionOfAssets
(Increase) decrease in:
Accounts receivable	1,019	(861)
Inventories	(323)us-gaap_IncreaseDecreaseInInventories	(822)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses	(322)	(581)
Income taxes refundable	0	(282)
Increase (decrease) in:
Accounts payable	1,368	(60)
Accrued expenses	299	(497)
Deferred revenue	(966)	(966)
Income taxes payable	332	(70)
Net cash provided by operating activities	6,849	1,437
Cash Flows from Investing Activities
Proceeds from sale	0	18
Purchase of property and equipment	(821)	(800)
Acquisition of Sterimedix Limited	(13,177)	0
Acquisition of patents and other intangibles	(167)	(229)
Net cash used in investing activities	(14,165)	(1,011)
Cash Flows from Financing Activities
Deferred financing costs	(102)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Proceeds from borrowings under the Term Loan Facility	2,750	0
Principal payment on Term Loan facility	(137)us-gaap_RepaymentsOfLinesOfCredit	0us-gaap_RepaymentsOfLinesOfCredit
Proceeds from the issuance of common stock	28	36
Tax benefit associated with the exercise of non-qualified stock options	28	25
Net cash provided by financing activities	2,567	61
Foreign exchange rate effect on cash and cash equivalents	(246)	(204)
Net (decrease) increase in cash and cash equivalents	(4,995)	283
Cash and cash equivalents
Beginning	15,443	12,470
Ending	$ 10,448	$ 12,753

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

+ Details

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Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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