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Stock-Based Compensation Expenses (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2014 | Jan. 31, 2013 | Jul. 31, 2013
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | $ 1,069,000 | $ 806,000 | $ 2,016,000 | $ 1,551,000 |
Estimated income tax benefit | (403,000) | (346,000) | (749,000) | (610,000) |
Net stock-based compensation expense | 666,000 | 460,000 | 1,267,000 | 941,000 |
Total remaining unrecognized compensation cost related to the unvested stock-based awards | 9,310,000 |  | 9,310,000 |  |
Estimated forfeitures related to unvested stock-based awards | 580,000 |  | 580,000 |  |
Weighted average number of years net compensation cost is expected to be recognized over |  |  | 3 years 1 month 6 days |  |
Stock-based compensation capitalized and included in ending inventory | 52,000 |  | 52,000 |  | 72,000
Cost of sales |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 84,000 | 74,000 | 137,000 | 119,000 |
Selling, general and administrative expenses |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 832,000 | 614,000 | 1,603,000 | 1,215,000 |
Research and development expenses |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 153,000 | 118,000 | 276,000 | 217,000 |
Stock Options |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 719,000 | 638,000 | 1,367,000 | 1,211,000 |
Performance Shares |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 230,000 | 86,000 | 407,000 | 172,000 |
Employee Stock Purchase Plan - ESPP |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 43,000 | 48,000 | 88,000 | 101,000 |
Discount offered to employees participating in the ESPP as a percentage of market price | 15.00% | 15.00% | 15.00% | 15.00% |
RSUs and restricted stock |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 68,000 | 28,000 | 136,000 | 60,000 |
Share units |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 6,000 | 6,000 | 12,000 | 12,000 |
Total equity-classified stock-based awards |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 1,066,000 | 806,000 | 2,010,000 | 1,556,000 |
SARs |  |  |  |  |
Stock-based Compensation Expenses |  |  |  |  |
Stock-based compensation expense before income tax benefit | 3,000 | 0 | 6,000 | (5,000) |
Accrued expense related to the cash settlement of liability-classified stock appreciation rights | $ 7,000 |  | $ 7,000 |  | $ 1,000

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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