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Accrued Expenses and Other Current Liabilities | 9 Months Ended
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Apr. 30, 2012
Accrued Expenses and Other Current Liabilities [Abstract] |
Accrued Expenses and Other Current Liabilities | (9) Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following:
| ##### April 30, 2012 |  | July 31, 2011
Accrued wages and benefits | $ 14,211,000 |  | 19,751,000
Accrued warranty obligations | 8,011,000 |  | 9,120,000
Accrued commissions and royalties | 4,594,000 |  | 3,295,000
Accrued business acquisition payments | 1,164,000 |  | 726,000
Other | 10,525,000 |  | 16,966,000
Accrued expenses and other current liabilities | $ 38,505,000 |  | 49,858,000
We provide warranty coverage for most of our products for a period of at least one year from the date of shipment. We record a liability for estimated warranty expense based on historical claims, product failure rates and other factors. Some of our product warranties are provided under long-term contracts, the costs of which are incorporated into our estimates of total contract costs. Changes in our product warranty liability during the nine months ended April 30, 2012 and 2011 were as follows:
| April 30, 2012 |  | April 30, 2011
Balance at beginning of period | $ 9,120,000 |  | 10,562,000
Provision for warranty obligations | 4,077,000 |  | 5,976,000
Reversal of warranty liability | - |  | (1,120,000)
Charges incurred | (5,186,000) |  | (6,572,000)
Balance at end of period | $ 8,011,000 |  | 8,846,000

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 24 -Article 5 + Details
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